added basic methods and properties to the BaseSoundManager class
added basic methods and properties to the BaseSoundManager class

BeanSeed/phaser,mahill/phaser,photonstorm/phaser,BeanSeed/phaser,pixelpicosean/phaser,TukekeSoft/phaser,rblopes/phaser,photonstorm/phaser,spayton/phaser,TukekeSoft/phaser,spayton/phaser,englercj/phaser,mahill/phaser,TukekeSoft/phaser