Implement vote sending to backend. Have trackdetails spit out a msotly complete audiotrack for voting. Fix voting to actually modify list. Fix js code to not break on songs with apostrophes.

src/ui/PlayerInterface.h

@@ -74,6 +74,9 @@ public:
     void playpauseUpdated();
     void skipRequestClicked();
     void skipDenyClicked();
+    void vote1clicked();
+    void vote2clicked();
+    void vote3clicked();
     void updateDetailsFromServer(AudioTrack track);
     void updateVoteableTracksFromServer(std::list<AudioTrack> tracks);
     void updateProgressFromTimer();