Custom JSON loader

Added a method in the Loader that enable the load of custom json files,
to be used like a the general settings of the game.

loading: game.load.json (key, url);
retrieving data from json file: game.cache.getText(key);
Preparing for 1.1.5 development.
Explicitly paused Timer continues if you un-focus and focus the browser window.
Added TimerEvent.pendingDelete and checks in Timer.update, so that removing an event in a callback no longer throws an exception.
Upgraded to Pixi.js 1.4.4
Group now extends PIXI.DisplayObjectContainer, rather than owning a _container property, which makes life a whole lot easier re: nesting.
More Group fixes to the new format. Updated list of included Pixi files to remove un-needed ones.
Added description for pad len parameter
browserify/requirejs error with SAT module fixed
Updated Phaser geometry classes so they over-ride the PIXI native ones, means we can do away with a whole bunch of over-rides and object changes in Sprite, etc.
Merge branch 'master' into dev
Removed all intances of Sprite.group from Group and replaced with the already existing parent property.
Timer checks now for running inside while loop. Any event which causes a call to Timer#stop is now safe.
Testing new Image object.
Fixed TypeScript defs on lines 1741-1748 (thanks wombatbuddy)
Merge pull request #368 from Arlefreak/dev

Added description for pad len parameter
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.