diff --git a/de1/.idea/workspace.xml b/de1/.idea/workspace.xml
deleted file mode 100644
index 5dd713cc..00000000
--- a/de1/.idea/workspace.xml
+++ /dev/null
@@ -1,188 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ChangeListManager">
-    <list default="true" id="b80b2fcf-256f-4c43-8992-60f6150d30c7" name="Default" comment="" />
-    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
-    <option name="TRACKING_ENABLED" value="true" />
-    <option name="SHOW_DIALOG" value="false" />
-    <option name="HIGHLIGHT_CONFLICTS" value="true" />
-    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
-    <option name="LAST_RESOLUTION" value="IGNORE" />
-  </component>
-  <component name="FileEditorManager">
-    <leaf />
-  </component>
-  <component name="GOROOT" path="/usr/lib/go-1.9" />
-  <component name="IdeDocumentHistory">
-    <option name="CHANGED_PATHS">
-      <list>
-        <option value="$PROJECT_DIR$/a_herf.go" />
-      </list>
-    </option>
-  </component>
-  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
-  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
-  <component name="JsGulpfileManager">
-    <detection-done>true</detection-done>
-    <sorting>DEFINITION_ORDER</sorting>
-  </component>
-  <component name="ProjectFrameBounds" extendedState="6">
-    <option name="y" value="30" />
-    <option name="width" value="1366" />
-    <option name="height" value="738" />
-  </component>
-  <component name="ProjectView">
-    <navigator currentView="ProjectPane" proportions="" version="1">
-      <flattenPackages />
-      <showMembers />
-      <showModules />
-      <showLibraryContents />
-      <hideEmptyPackages />
-      <abbreviatePackageNames />
-      <autoscrollToSource />
-      <autoscrollFromSource />
-      <sortByType />
-      <manualOrder />
-      <foldersAlwaysOnTop value="true" />
-    </navigator>
-    <panes>
-      <pane id="Scope" />
-      <pane id="ProjectPane">
-        <subPane>
-          <expand>
-            <path>
-              <item name="de1" type="b2602c69:ProjectViewProjectNode" />
-              <item name="de1" type="462c0819:PsiDirectoryNode" />
-            </path>
-          </expand>
-          <select />
-        </subPane>
-      </pane>
-      <pane id="Scratches" />
-    </panes>
-  </component>
-  <component name="PropertiesComponent">
-    <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
-    <property name="go.sdk.automatically.set" value="true" />
-  </component>
-  <component name="RunDashboard">
-    <option name="ruleStates">
-      <list>
-        <RuleState>
-          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
-        </RuleState>
-        <RuleState>
-          <option name="name" value="StatusDashboardGroupingRule" />
-        </RuleState>
-      </list>
-    </option>
-  </component>
-  <component name="RunManager">
-    <configuration default="true" type="GoApplicationRunConfiguration" factoryName="Go Application">
-      <module name="de1" />
-      <working_directory value="$PROJECT_DIR$/" />
-      <go_parameters value="-i" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/" />
-      <directory value="$PROJECT_DIR$/" />
-    </configuration>
-    <configuration name="go build a_herf.go" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true">
-      <module name="de1" />
-      <working_directory value="$PROJECT_DIR$/" />
-      <go_parameters value="-i" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/a_herf.go" />
-      <directory value="$PROJECT_DIR$/" />
-    </configuration>
-    <configuration default="true" type="GoTestRunConfiguration" factoryName="Go Test">
-      <module name="de1" />
-      <working_directory value="$PROJECT_DIR$/" />
-      <go_parameters value="-i" />
-      <framework value="gotest" />
-      <kind value="DIRECTORY" />
-    </configuration>
-    <recent_temporary>
-      <list size="1">
-        <item index="0" class="java.lang.String" itemvalue="Go Build.go build a_herf.go" />
-      </list>
-    </recent_temporary>
-  </component>
-  <component name="ShelveChangesManager" show_recycled="false">
-    <option name="remove_strategy" value="false" />
-  </component>
-  <component name="ToolWindowManager">
-    <frame x="0" y="30" width="1366" height="738" extended-state="6" />
-    <layout>
-      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.27954546" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
-      <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
-      <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32885906" sideWeight="0.50297177" order="7" side_tool="true" content_ui="tabs" />
-      <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
-      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39967373" sideWeight="0.49702823" order="2" side_tool="false" content_ui="tabs" />
-      <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="false" weight="0.33" sideWeight="0.5" order="8" side_tool="false" content_ui="tabs" />
-      <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-      <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32952693" sideWeight="0.5" order="9" side_tool="false" content_ui="tabs" />
-      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.39937106" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
-      <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
-      <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
-      <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
-      <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
-      <window_info id="Inspection" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
-      <window_info id="Hierarchy" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="2" side_tool="false" content_ui="combo" />
-      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-      <window_info id="Ant Build" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
-    </layout>
-  </component>
-  <component name="TypeScriptGeneratedFilesManager">
-    <option name="version" value="1" />
-  </component>
-  <component name="VcsContentAnnotationSettings">
-    <option name="myLimit" value="2678400000" />
-  </component>
-  <component name="XDebuggerManager">
-    <breakpoint-manager />
-    <watches-manager />
-  </component>
-  <component name="editorHistoryManager">
-    <entry file="file:///usr/lib/go-1.9/src/os/file_unix.go">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="106">
-          <caret line="146" column="46" lean-forward="false" selection-start-line="146" selection-start-column="46" selection-end-line="146" selection-end-column="46" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file:///usr/lib/go-1.9/src/os/types.go">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="124">
-          <caret line="44" column="47" lean-forward="false" selection-start-line="44" selection-start-column="30" selection-end-line="44" selection-end-column="50" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file:///usr/lib/go-1.9/src/syscall/zerrors_linux_amd64.go">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="-15792">
-          <caret line="658" column="12" lean-forward="false" selection-start-line="658" selection-start-column="12" selection-end-line="658" selection-end-column="12" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/a_herf.go">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="-780">
-          <caret line="45" column="42" lean-forward="true" selection-start-line="45" selection-start-column="42" selection-end-line="45" selection-end-column="42" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file:///usr/lib/go-1.9/src/os/file.go">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="610">
-          <caret line="64" column="9" lean-forward="false" selection-start-line="64" selection-start-column="9" selection-end-line="64" selection-end-column="9" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-  </component>
-</project>
\ No newline at end of file