fix Interface code displayed instead of controllers'

Controller's name is a usually a substring of interface's name hence the
old check was error-prone.

This closes ariatemplates/usermanual#33
Display "open in new tab" only if sample is in iframe
Merge pull request #12 from simonarbuckle/master

Updated snippets to support testing on local versions of AT framework.
Updated snippets to support changing the skin using a url parameter.