tmp Add .nyanify command to Mecab
tmp Add .azunyanify to Mecab
tmp render replaced kanji as katakana in Mecab
Escape bot nick in IRCMessage regexps
Allow full-width ASCII in IRCMessage.bot_command

Now full-width ASCII characters in bot_command
are automagically converted to their regular analogs.
Moreover, space after command is no longer necessary,
any first non-ASCII char now delineates command border.

Side effect is that now bot_command and tail are parsed eagerly.

This contradicts the goal of command_prefix field of
allowing per-channel command char, but that can be fixed later.
tmp hack to make default command in private