Update enyo.js and loader.js for spacing and JSHint issues

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@palm.com)
Fix tests for spacing and JSHint issues
Add new LoaderTest to test script loading system (but disabled for 2.2 release)

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@palm.com)