BHV-5140: Add timeout property as facade to enyo.Async
Merge pull request #31 from enyojs/BHV-5140-SungbaeCho

BHV-5140: Add timeout property as facade to enyo.Async

Reviewed-By: Cole Davis (cole.davis@lge.com)
Update version string to 2.5.1-pre.1
Merge branch 'master' into ENYO-14

Conflicts:
	source/LunaService.js
	version.js