Removed all intances of Sprite.group from Group and replaced with the already existing parent property.
Testing new Image object.
Merge pull request #367 from georgiee/develop

Phaser.Timer#stop
Fixed TypeScript defs on lines 1741-1748 (thanks wombatbuddy)
Change to boot order to try and resolve short-TTL timers.
Sprite.crop() now takes a Phaser.Rectangle instead of explicit parameters.
Phaser.Image is a brand new display object perfect for logos, backgrounds, etc. You can scale, rotate, tint and blend and Image, but it has no animation, physics body or input events.
Previously if you used Sprite.crop() it would crop all Sprites using the same base image. It now takes a local copy of the texture data and crops just that.
Phaser.AnimationParser now sets the trimmed data directly for Pixi Texture frames. Tested across JSON Hash, JSON Data, Sprite Sheet and XML.
Updated Rectangle to use prototype based getters and setters (re: iOS speed discussion on the forum).
Added the SAT class to the TypeScript defs file. Also this fixes #369.
More animation tests.
Game.add.renderTexture now has the addToCache parameter. If set the texture will be stored in Game.Cache and can be retrieved with Cache.getTexture(key).
Game.add.bitmapData now has the addToCache parameter. If set the texture will be stored in Game.Cache and can be retrieved with Cache.getBitmapData(key).
Introduce hold and recover methods in Timer to maintain a another state of not running for main game pause/resume.