In enyo.DataTable, replace enyo.DataController (which no longer exists) with enyo.Collection.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton <gray.norton@lge.com>
Merge pull request #278 from enyojs/graynorton-replace-data-controller

Over-the-shoulder review from Kevin Schaaf (kevin.schaaf@lge.com).