added rotation/position "tracking" functions

they trigger on every frame when the object is detected
added examples for new functions
fixed onRotate and onOrient
updated examples
added onRotate example
added bundleTags example
fixed example
added onFlip and helper functions

we can easily check if an object is facing the camera or seen from
behind as well as track its angle with respect to the camera regardless
of its position and Euler rotation
updated asteroids game to use onFlip
added examples for new functions
added explosion animation and death logic
added a readme
Update README.md
updated phaser_demo_2 description
graphic update of demos 1 and 2

also corrected physics bug of demo 2
fixed misplaced first cars in phaser_demo_2
removed trailing whitespaces
edited tag configuration for asteroids card
added onTilt and onTiltUpdate

replaced getAngleToCamera by getTilt to now track inclination and
direction of inclination
added orientation to all callbacks using getTilt