Implemented callbackOnce flag in NodeList.transtion (issue 832)
Added test for callbackOnce flag
fixed formatting in transition unit test
fixed issue with the test, it would always pass if any callbacks were fired
changed the test to increment a counter and using a delayed wait to test
changed wording in unit test fail message
updated HISTORY.md with NodeList.transition optional flag info
YUI and Loader build for latest Gallery build
Revert test cases to only test the basic queue

It's not necessary to test both Flash and HTML5 in
these instances - those tests should be covered in
their own individual test suites.
Merge branch 'issue-832-trans-end' into dev-master
Update Transition HISTORY.md
Build Transition