Make enyo.options.noDefer a toggle you can change between script loads instead of a one-time flag

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #450 from enyojs/enyo-options-nodefer-at-runtime

Make enyo.options.noDefer a toggle you can change between script loads i...