added ArcMenu and RayMenu lib widgets;
added Ease, Tweener, AnimationBundle utils from GlowPadView package; (the view itself will be added lately)
added GlowPadView to lib core;
added GPView utils;
refactoring ArcLayout animations;
updated API;
added bitmap save procedure;
refactoring .ui.widget package structure;
extended api for ArcMenu ui widget;
fixed metrics with ArcMenu;