- added compatibility method to Canvas to allow SDL_Surface access
- added drawBorder method to Canvas to replace CSDL_Ext method
- added drawColor method to Canvas to replace CSDL_Ext method
- minor changes to Tavern and Trade windows to adapt to new API
- Added EShortcut enumeration that contains all in-game shortcuts
- CIntObject::keyPressed now receive values from hotkey enumeration
- On keypress, SDL key code will be translated to shortcut ID
- Removed access to SDL key codes from most of engine
- Rect no longer inherits from SDL_Rect
- renamed vcmi functions that used SDL naming format
- moved all functions in SDL_Extensions file into CSDL_Ext namespace
- SDL_Rect is now used only by SDL_Extensions, all other code uses Rect
* Changed most gui classes to use shared pointers
* Store and use IImage as shared_ptr
* CSpellWindow redesign
* AdventureMapClasses cleanup
* CLabel: store background as smart pointer
* Store CObjectList items as smart pointers
* Removed destroy function of list item
* Store toggle buttons as smart pointers
* Use CComponent as smart pointer
* Attempt to fix artifact merchant drawing
