sound loading example

[timohausmann]

Hey there. First of all, awesome library, helps alot.
Thought I let you know: I had an issue with your audio loading example on http://thinkpixellab.com/pxloader/.

It happened to me that addSound() occurs before the soundManager is ready for usage, resulting in an error.

I solved it by calling the loadSound()s and loader.start(); within the soundManager.onready-function.
addImage() can be done before soundManagers' onready though.

[JamesMcFall]

Thanks for documenting this. I've had the same issue.

[jamesxwang]

Thanks, helped a lot! 👍