Merge pull request #261 from jlipps/master

misc fixes
Add elementDisplayed and test for remote debugger.
isEnabled and test for remote.
Semicolons. Aaaaaah.
Merge pull request #262 from maudineormsby/master

Add isEnabled and isDisplayed for the remote protocol, plus tests
these callbacks need to conform to node error handling convention
remove orientation test in appiumutils, it's redundant