Implement Error handling

[imsnif]

Right now we panic when there's an error. Since we do that inside a thread, it's very hard to tell what caused the error. This is especially true if the error we end up getting is an error from another thread that fails to send a message to the panicked thread.

We need some system that would (among other things) allow us to get proper errors across our threads. This will greatly ease development.

[kunalmohan]

I would like to work on this issue 😃. Will start in a couple of days(as discussed on discord).

[roee-shapira-tikal]

@kunalmohan I used panic::set_hook to try and fix this error two of the tests, it might help you too...