Cleaned up README.md
Added workbench/ with some unintegrated, but useful, ncurses code
Moved bnc_client's on_recv() to generic_irc, + full IRC numeric table

* Moved on_recv() from the bnc_client class to generic_irc so it can be
  shared by irc_client
* Added full IRC Numeric Code to String Reply Table
Extended BNC IRC handler to "try method"-method, more BNC code, MOTD