- 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