Implement (un)saving tracks, albums; (un)following artists

Cargo.toml

@@ -22,7 +22,7 @@ failure = "0.1.3"
 fern = "0.5"
 futures = "0.1"
 log = "0.4.0"
-rspotify = "0.4.0"
+#rspotify = "0.4.0"
 serde = "1.0"
 serde_json = "1.0"
 toml = "0.4"
@@ -34,6 +34,10 @@ dbus = { version = "0.6.4", optional = true }
 rand = "0.6.5"
 webbrowser = "0.5"
 
+[dependencies.rspotify]
+git = "https://github.com/KoffeinFlummi/rspotify"
+rev = "1a30afc"
+
 [dependencies.librespot]
 git = "https://github.com/librespot-org/librespot.git"
 rev = "14721f4"