Feature/try catch #57
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Tried to implement try, catch, finally. It captures the correct control flow. I added some helper methods for testing as well as some tweaks so I could run the tests using nodejs and mocha.
I haven't quite got the behavior right on the attaching and populating the scope needed for the catch block.Edit: grabbed the right scope code for catch blocks from master and added it to this implementation, and it fixed the last test.