tell goodbye to leaving users
get new posts from habr, filtered by keywords
add several key words for habr, including 'urban'
add keyword 4pda
INSTALL: add dependency python-httplib2
INSTALL: add windows instructions
INSTALL: help about env vars
catch everything
listen uc recent changes; print short link in response
help += changes
last_change = now(); do not print changes from past
memorize sender functions for chats (fix +-change)
IRC support
add >2 users chats to announces automatically
announce new habr articles
irc: do not produce long messages; help on pastebin
shorten links including ":"
changes: print comment if exists
featured whois
print error messages on errors