JavaScript improvements for a major release

[brodycj]

• Same cordova-js build for all platforms. Use of concepts such as IOC (inversion of control), DI, factory functions, etc. to keep same common JavaScript for all platforms, with limited number of platform-specific functions. I would be happy to explain further if this is not clear enough.
• Cordova JavaScript should initialize the functions, structures, queues, etc. so that application JavaScript does not have to wait for deviceready event (already raised in Improve startup in JavaScript #60). I think this could be an especially major win with frameworks like Angular.

I would be happy to make a demo for discussion, cannot promise when I can make the time.