Error handler

[archseer]

We need to place stubs in the exports registry for modules that aren't loaded yet, but referenced elsewhere. These should call the error handler, (which in the erlang stdlib will try to load the module or error).

http://erlang.org/doc/man/error_handler.html

Search for references to error_handler inside beam_emu.c and enigma for a quickstart.

[archseer]

This is more or less done. Need to double check if we covered all the parts.