* Add a test
* Catch TypeErrorException
* Make exception asserts check error type
* Remove commented-out testcase and check for error type
* Test for Error, not TypeError
All realm operations for the RPC are now done in their own thread so it can be allowed to block on waiting for callback results. The recursive and multi-threaded nature of this makes it pretty tricky, but it works!
The JS engine details are mostly abstracted away. This breaks JSC support until the rest of the pieces are in place. The Node version builds and runs, but crashes when creating a Realm object.
