Don't create __jobs hash in enyo.Component until it's used to reduce startup time

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #442 from enyojs/reduce-jobs-overhead

Don't create __jobs hash in enyo.Component until it's used to reduce sta...

Reviewed-By: Cole Davis (cole.davis@lge.com)