Add AttributeListener.
Simplify triggerStat function.
Simplify AttributeListener.
Add StatListener.
Remove depricated event and depricated listener.
Add support for <animation> tag in map files.
Fix compilation warning.
Add ArrowsListener.

Also fix arrows amount update on arrows pickup.
Add UpdateStatusListener.
Add type defines for SDL_Rect based on SDL version.
Fix code style in gui.
Fix code style in resources.
Fix code style in render.
Fix code style in net.
Fix code style in being.
Fix code style in input.
Fix code style in utils.
Fix code style in other files.
Fix compilation with old gcc and clang.
update manaplus.cbp.