move dapp up to Intern 2.1.0, and cleanup testcases. 

Made updates to some tests to be skipped on FF and IE, I added FF to run on saucelabs, but still have issues on IE on saucelabs even though tests run on IE on my system. Also removed use of dojo/json, switch to use decor/sniff and removed some has.add calls for requirejs which were not needed, and some tests needed a call to deliver() to get initial values set.