ENYO-690: Add media query for setting root size.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
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; adde samples for testing.

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>
Merge commit '890ee1a8c6e02d833e5d896aa1a748ded007bb63' into ENYO-690-rem-blakestephens

Conflicts:
	css/moonstone-dark.css
	css/moonstone-light.css
	css/moonstone-rules.less
Merge pull request #1848 from enyojs/ENYO-690-rem-blakestephens

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