TODO

- Reorganize the modules a bit more... we should have a src/irc/dcc/send.lua, src/irc/ctcp/base.lua, src/irc/ctcp/dcc.lua, etc. also, most (all?) of the handlers should be moved out of irc.lua into, say, src/irc/base.lua
- Separate out the DCC module some more so that the callbacks aren't registered unless the module is loaded
- Also separate out all of the CTCP commands/callbacks into the CTCP module
- Rework the way irc.lua uses things from modules - the whole underscore but public thing... do i want to keep that? i suppose it's not horrible... look into this more
- Implement callbacks for user mode changes (need to figure out how to represent users in the callback info)
- Allow a server parameter in whois() so that the returned data can include the user's idle time
- chan:ban()/chan:unban() should take a usermask, not a nick, or be able to generate a usermask from a nick, or something like that
- Clean up misc.split
- Implement DCC CHAT
- Implement DCC XMIT/OFFER
- Implement some more of the newer CTCP commands
- Implement more information requests
  - who
  - whowas
  - info
  - stats
  - links
  - trace (not freenode supported)
- Implement XDCC (?)
- Handle endianness in the IP address conversion functions