Closes#426.
This makes the pylink::prefix (aka bot::prefix) option only affect the main PyLink bot, and deprecates the pylink::prefixes::<...> options.
As the bot: config block is no longer checked, this commit depends on commit 45ed5b962e215763f7659631d1b98a5031dbab92 (ref #343) to alias it to conf::pylink.
New behaviour for command responses in general: FANTASY commands reply in channel as PRIVMSG, while all commands sent in PM reply as private notices.
- The old irc.called_by is now irc.called_in (PLACE last command was called)
- irc.called_by is now used to store the CALLER of the last command
- notice=True/False toggle is dropped from ServiceBot.call_cmd()
- New private=True/False option added to ServiceBot.reply() and irc.reply(), which controls whether replies should be sent privately or not.
