Added removeLayer and destroyLayer methods.
Added removeLayer and destroyLayer methods.

TukekeSoft/phaser,spayton/phaser,mahill/phaser,TukekeSoft/phaser,mahill/phaser,photonstorm/phaser,BeanSeed/phaser,photonstorm/phaser,BeanSeed/phaser,TukekeSoft/phaser,spayton/phaser