added getMagnitude, setMagnitude, normalize and isZero methods to Point
Added Group.cursor. This points to the first item added to a Group. You can move the cursor with Group.next() and Group.previous().
Updated debug header and added more info to the project template.
Merge pull request #150 from beeglebug/master

added getMagnitude, setMagnitude, normalize and isZero methods to Point
Tilemaps examples updated
Merge pull request #155 from alvinsight/dev

Tilemaps examples updated
Invaders game improved
Merge pull request #158 from alvinsight/dev

Invaders game improved
Group.callAll now supports nested functions and a context, making it really powerful!
Updated invaders demo.
Tidied up the code base
Merge pull request #159 from alvinsight/dev

Tidied up space invaders' code base
Updated docs for 1.1.2 release.
Preparing 1.1.3 dev branch