imager.js updated.

Carried over from https://github.com/stephenplusplus/imager/issues/1:

Hey guys,

I took a stab at elaborating on the prototype from https://gist.github.com/Integralist/6157139. I thought we could use a repository just for the imager library itself, and the other one would be the collaboration of the plug-in, the grunt task, etc. (I set this up as a bower component, but of course didn't and won't register anything)

Does this function as originally intended? I added in image caching (one of many parts that could use a review).

The script runs without dependencies currently. (the first few labels are things that can be modularized/outsourced/improved/scrapped depending on what browser support/dependencies is targeted) It does allow jQuery to take the wheel if it's present on the page. If I went off in a wrong direction, I have no problem scrapping this.

Hope this helps the overall mission!