Emitter now calls the Phaser.Particle.onEmit function, which is left empty for you to override and add in custom behaviours.
Added jsdocs to Particle and Emitter. Fixed p2 UMD.
Tidied up the Grunt tasks a little to name them more accurately.
Renamed phaser-no-physics to phaser-arcade-physics, which is far more accurate.
Removed un-used builds.