Add support for .enter() and .exit()

[piranna]

I know it would not be easy but probably it would be done by listening on window object for uncaught exceptions...

[piranna]

At http://stackoverflow.com/questions/17069069/javascript-uncaught-exception-handling-window-onerror-msg-argument-format there's a JsFiddle example about how to do it.

[balupton]

Addressed by #5 which needs to be worked on merging

[balupton]

#9 is a closer solution, but see my comment there for why it is on hold.