GF-1784: Add useMouseWheel:false support to enyo.Scroller (and its scroll strategies).

Enyo-DCO-1.1-Signed-off-by: Kevin Schaaf <kevin.schaaf@lge.com>
Merge pull request #243 from enyojs/ENYO-1784-kevinpschaaf

GF-1784: Add useMouseWheel:false support to enyo.Scroller (and its scrol...

Reviewed-By: Ben Combee (ben.combee@lge.com)