Add travis-ci jshint checking for layout library
Fix jshint issues with Easing, Flex, and NameGenerator.js

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Add missing period after jshint in .travis.yml

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #24 from enyojs/travisci-jshint

Travisci jshint

Reviewed-By: Gray Norton <gray.norton@lge.com>