ENYO-2301: fix XHR code to only apply cache-control code for iOS 6, not 6+. Clarify comments to note this behavior.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #309 from enyojs/ENYO-2301-unwiredben

ENYO-2301: fix XHR code to only apply cache-control code for iOS 6, not ...
Fix enyo.Drawer and GestureSample.js to properly stop animation event propogation

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Remove playground sample from Enyo -- it's no longer featured on website and it relies on a library in extra that I'm removing.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #314 from enyojs/remove-playground

Remove playground sample from Enyo -- it's no longer featured on website...
Merge pull request #312 from enyojs/stop-animation-events

Fix enyo.Drawer and GestureSample.js to properly stop animation event pr...
Merge branch 'master' into delay-enyo-kind