New js instantiation

[a14n]

This change simplifies instantiations. It also allows to instantiate ArrayBuffer and Uint8Array for which I had the following errors in Chrome :

Object function ArrayBuffer() { [native code] } has no method 'apply'
Object function Uint8Array() { [native code] } has no method 'apply'

[sethladd]

Thanks for the patch! Vijay is on vacation now, so there might be a delay before he checks this out.

Much appreciated!

[adam-singer]

@a14n Thanks for this patch!
@sethladd I tested this patch, worked great with the Chrome App sample that communicates over serial to a ADK2012 http://goo.gl/ARW3S

[efortuna]

Awesome!