Add taglib to project to get extra cover data(and possibly replace libgroove for this function). Remove oggs from accepted files until I can figure out cover data for them better. Add non-persisted field for this to audiotrack object and method to add this data to it in memory.

src/db/AudioTrack.h

@@ -21,6 +21,7 @@
 #define AUDIOTRACK_H
 
 #include <Wt/Dbo/Dbo>
+#include <taglib/tbytevector.h>
 
 class AudioTrack
 {
@@ -33,6 +34,10 @@ public:
     std::string trackFingerprint;
     std::string trackPath;
     
+    //Non-persisted data
+    TagLib::ByteVector coverArt;
+    std::string coverMimeType;
+    
     template<class Action>
     void persist(Action& a)
     {