Converted all enyo.Image references to moon.Image; added moon-resolution...

* Converted all enyo.Image references to moon.Image
* Added moon-resolution, which can detect and return various screen types
* Added moon.Image which adds support for multi-res image sources
* Added samples for testing.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>