Changed the zoom icons. Inverted InfoToolBar and ToolBar, moved the volume slider into the first. Continue working on Zoom code.
Basic implementation of EffectsManager.
Cleanup of unuseful and obsolete methods. Added missing file AudioEffects.h.
Renamed some files.
Made FaberEffect::FilterTrack pure virtual. Various widgets and utility classes added from libwalter and Haiku's source : AboutWindow, Spinner, ScreenInfo, InputRequest.