1.2

Hello there !

I tested my AStar Phaser Plugin with the 1.2 branch (Phaser 2.0) so I submit it here. (plugins/AStar.js)
I had to adapt some code like the physicsEnabled on my demo sprite for 2.0 but all seems to work now.
It's working with builtin Tilemaps.
I added an example to the Phaser examples page under "plugins" section.
The script is also embedded is the view_full.html template. 
I don't know what is the proper way to load a Plugin script ?

I'm quite new to gitHub, this is my very first pull request.
Hope everything is ok.

Regards,

Rafarel