Multi-protocol

Lots of chagnes to add multi protocol flexibility, not really
completed yet, still have to rework text messages opcodes and other stuff,
so this still a working in progress feature

* Rework dat reader, the dat reader can now
* dinamically detect dat version
* Split game into gamelib and game_interface
* Lots of other minor changes

src/framework/core/application.h

@@ -58,6 +58,7 @@ public:
     std::string getBuildCommit() { return BUILD_COMMIT; }
     std::string getBuildType() { return BUILD_TYPE; }
     std::string getBuildArch() { return BUILD_ARCH; }
+    std::string getOs();
     std::string getStartupOptions() { return m_startupOptions; }
 
 protected: