P2 Body Begin and End Contact events done and working nicely.
New P2 examples. And fixed Camera.atLimit value.
add missing Keyboard.removeKey method
Added in Game.focusLoss and focusGain methods and onBlur and onFocus signals to listen for. Made small time related fix and tested on iOS6 and iOS7 home screen button + lock button and all working fine.
Merge pull request #550 from qdrj/1.2

add missing Keyboard.removeKey method
P2 postBroadphase example and handler done. Group.enableBodyDebug added. Sprites no longer remove bodies from the world if exists = false, instead they set safeDestroy to true, which removes the body on the next preUpdate, to avoid mid-step destruction issues.
P2 collision groups and callbacks working as expected, new example done.
Fixed bug causing Text with empty or no given text to break. Added World.createSpring.
Get First Dead example.
P2 Springs example done and working nicely.
Distance and Gear constraints done.
enableBody added to Group constructor. Also: game.add.physicsGroup(Phaser.Physics.ARCADE) is a thing :)
Updated games examples
Merge pull request #553 from alvinsight/1.2

Updated games examples
Revolute Constraint done.
Prismatic Constraint done. That's all of them! jshint time.
Added World.frameRate - The frame rate the world will be stepped at. Defaults to 1 / 60, but you can change here. Also see useElapsedTime property.
Added World.useElapsedTime - If true the frameRate value will be ignored and instead p2 will step with the value of Game.Time.physicsElapsed, which is a delta time value. #554
New examples for ninja physics, bitmap text, and documented the map function
Merge pull request #556 from alvinsight/1.2

New examples for ninja physics, bitmap text, and documented the map func
preUpdate rotation fix.