Add .jshintrc, make all layout source jshint clean
Fix a few global leak problems found by jshint

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Cleanup a few layout samples to remove dead code and prevent duplicate kind definitions

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge branch 'master' of github.com:enyojs/layout