Totally reworked bulletins script

* Major changes to the bulletins script: There's now a top ten callers / msg writers in addition to the textfile browser. 
* Changed writemsgs.py: user.msgs_sent += 1
* Changed the name of the "dev" folder to "extras" as I find that more logical.
* Removed a dead board from logoff.py and added good ol' Caphood's BBS instead.