[Core] Added LinearTimer;
[Core] Added Open/Save File Dialog;
[Core] Added support for DefaultLayout files;
[Core] Removed most UI Elements;
[Core] Added Bitwise-manipulation Lua Methods;
Cleaned up unused Dependencies;
[Core] Added RotateableRect;
[Core] UIText now adds the text size on each String;
[Core] UIManager and UILayout now have proper handling of Startup Events and Layout Visibility;
[Core] Added more missing documentation;
[Core] Added GUI Rotation Support;
[Core] Added RenderTextUtils Rotation Support;
[Core] Added GUI ExtraSizeScale;
[Core] Added Sprite NinePatchScale (currently broken);
[Core] Fixed misc bugs with FrameworkLuaLib and TiledMaps;