Add Erlang support

Erlang support for CATS.
To install Erlang:
1. Check out binaries form http://www.erlang.org/download.html;
2. Set up binaries into directory, which is referred in config file.

Important: "-run init stop" parameter is needed to stop Erlang VM after
execution.
Merge pull request #4 from savva-paladin/master

Add Erlang support