Add access to IRC capabilities like account-notify

[ctian1]

http://ircv3.net/specs/extensions/account-notify-3.1.html

[ctian1]

Should be hookable by @hook.event

[paris-ci]

To track usernames changes ?

[ctian1]

Sure, I guess.. there's other capabilities you can try adding too. You can also try adding NickServ support.

[paris-ci]

For nickserv auth we have #68 , for permissions we have #24 and for ghosting #13

[ctian1]

For all of these, some way of accessing NickServ should be implemented for hooks and then plugins can be written for them to add behavior