Add enyo.Component.startJob/stopJob as alternatives to enyo.job for per-instance jobs
Add tests to core to verify functionality of new methods

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@palm.com)
Merge pull request #231 from enyojs/unwiredben_componentjobs

Add enyo.Component.startJob/stopJob as alternatives to enyo.job for per-...