Re-implements odescribe and oit functionality as suggested by Kristian C...

...alhoun describe in this thread https://groups.google.com/d/topic/jasmine-js/MV6lkeLRqFE/discussion.

See this post https://groups.google.com/d/msg/jasmine-js/MV6lkeLRqFE/XdPMaGrz2d8J.