Please, merge my PowerShell examples for all chapters (#106)

* PowerShell 01_introduction_to_algorithms example

* PowerShell 02_selection_sort example

* PowerShell 03_recursion examples

* PowerShell 04_quicksort examples

* PowerShell 05_hash_tables examples

* PowerShell 06_breadth-first_search example

* PowerShell 07_dijkstras_algorithm example

* PowerShell 08_greedy_algorithms example

* Powershell 09_dynamic_programming example

06_breadth-first_search/PowerShell/01_breadth-first_search.ps1

@@ -0,0 +1,46 @@
+$graph = @{}
+$graph["you"] = @("alice", "bob", "claire")
+$graph["bob"] = @("anuj", "peggy")
+$graph["alice"] = @("peggy")
+$graph["claire"] = @("thom", "jonny")
+$graph["anuj"] = @()
+$graph["peggy"] = @()
+$graph["thom"] = @()
+$graph["jonny"] = @()
+
+function Test-GRKPersonIsSeller
+{
+    param($name)
+    return $name[-1] -eq 'm'
+}
+
+function Search-GRKPerson
+{
+    param($name)
+    $search_queue = New-Object System.Collections.Queue
+    $graph[$name] | % {$search_queue.Enqueue($_)}
+    # This array is how you keep track of which people you've searched before.
+    $searched = New-Object System.Collections.Generic.List[System.Object]
+    while ($search_queue.count -gt 0) {
+        $person = $search_queue.Dequeue()
+        # Only search this person if you haven't already searched them.
+        if ($person -notin $searched)
+        {
+            if (Test-GRKPersonIsSeller($person))
+            {
+                Write-Host($person + " is a mango seller!")
+                return $True
+            }
+            else
+            {
+                $graph[$person] | % {$search_queue.Enqueue($_)}
+                # Marks this person as searched
+                $searched.Add($person)
+            }
+         
+        }
+    }
+    return $False
+}
+
+Search-GRKPerson you