Have GroovePlayer init music db on creation. Make fields correctly be fk.

src/GroovePlayer.cpp

@@ -18,8 +18,22 @@
  */
 
 #include "GroovePlayer.h"
+#include "db/User.h"
+#include "db/AudioTrack.h"
+#include "db/UserAction.h"
+#include <Wt/WLogger>
 
-GroovePlayer::GroovePlayer()
+GroovePlayer::GroovePlayer(std::string dbFile) : sqliteConnection(dbFile)
 {
+    sqlSession.setConnection(this->sqliteConnection);
+    sqlSession.mapClass<User>("user");
+    sqlSession.mapClass<AudioTrack>("tracks");
+    sqlSession.mapClass<UserAction>("actions");
+    try
+    {
+        sqlSession.createTables();
+    } catch(Wt::Dbo::Exception e) 
+    {
+        Wt::log("info") << "Using Existing DB.";
+    }
 }
-