Fix Repeater sample to property stop propagation in onSetupItem handler

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Clarify docs for enyo.Object.set to note the force parameter, implicitly pulled in from enyo.setPath.

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #268 from enyojs/minor-tweaks

Minor tweaks

Reviewed-By: Cole Davis (cole.davis@lge.com)