Revert "Added Firefox support to /page command"

This reverts commit d9b718fa75a7a32e40474ab69ba84070da8eaadc.
Recursively mkdir incase they do not exist.
Fix weighted tab completion for nicknames. It was broken. It works better now.
Revamped [IRCChannel detectOutgoingConversation:]
It might be overkill and possibly a bit unecessary, but now anytime you mention someone it bumps their rank up.