NickServ: Change default guest prefix to "Guest"
Having no prefix by default is probably not a good idea as it tends to generate
nicknames that are technically invalid.
Merge pull request #53 from Heufneutje/fix-guest-nicks

NickServ: Change default guest prefix to "Guest"
Various consistency fixes in numerous modules
Some of these were my own fault, but I went ahead and fixed a couple of
inconsistencies I found. Mainly EOF newlines and interface implementation.
Merge pull request #57 from Heufneutje/fix-formatting

Various consistency fixes in numerous modules
Remove users' account names when they are logged out
ChanServ: Service for persisting settings and modes for channels