removed formatter as new ImageData fails in at least Edge, replaced w…

[cthedot]

…ith imgData.data.set(newPixelData). Normalized newPixelData naming.

Main Change is that lib is working in Edge now (actually in IE11 too, tested on Win10 x64).

The server.js is a basic node based server to be able to test it locally w/o webserver. Not needed really, feel free to omit.

Thanks!

[cthedot]

Found solution to failure of new ImageData at SO (where else ;) http://stackoverflow.com/questions/13626465/how-to-create-a-new-imagedata-object-independently

Not sure if browsers should allow creating a new ImageData object, guess should check the spec. At least Edge does not allow it and so the former implementation failed.