Make enyo.Scroller non-deferred for API compat

We've documented that app developers can modify enyo.Scroller.touchScrolling
to change the default behavior, so we need to ensure this kind exists in its
final form from definition time.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #518 from enyojs/undefer-scroller

Make enyo.Scroller non-deferred for API compat

Reviewed-By: Cole Davis (cole.davis@lge.com)