logic: code controller communication

- Replaced CodeAccess with LocationAccess.
- Implemented basic functionality for CodeController.
- Added messaging to the project.
- Added QtThreadedFunctor to enable our Messaging thread to invoke calls on the QtThread.
- Added GraphController.

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src/lib/data/access/LocationAccess.h

@@ -0,0 +1,17 @@
+#ifndef LOCATION_ACCESS_H
+#define LOCATION_ACCESS_H
+
+#include "utility/types.h"
+
+class TokenLocation;
+
+class LocationAccess
+{
+public:
+	virtual ~LocationAccess();
+	virtual TokenLocation* getTokenLocation(Id locationId) = 0;
+
+};
+
+
+#endif // LOCATION_ACCESS_H