add LICENSE file
many changes, not enough to fit on one commit line

* don't use regex to determine channels
* (str|ary).contains() shim
* UTF-8 encode all output
* new PM notice APIs (send via NOTICE to users, PRIVMSG to chan)
* [badword] message shortening tweaks
* [calcbot] tweaks to dice
* [google] include Google's page summary
* [meanie] slight logic tweaks, OK!?
* [moocow] it now hates Big Macs