Allow functions to fetch nickserv passwords

* circe.el (circe-network-options): Update docstring.
(circe-nickserv-password): Update docstring.
(circe-nickserv-identify): Allow a function for the nickserv password.
Merge pull request #90 from capitaomorte/functions-for-nickserv-passwords

Allow functions to fetch nickserv passwords
Make tracking links in the mode line clickable.

A user will now be able to click on buffer names in the tracking
mode line when there is activity in them.

Thanks to João Távora for the initial pull request.
Implement italic control code
Merge pull request #92 from wasamasa/feature-italic-irc-control-code

Implement italic control code
lui-autopaste.el: fix bpaste helper

It seems the bpaste service recently changed it's API and defaulted to
running on the https port. In lieu of any official documentation I
traced the post request in my browser and saw what was getting sent.

Signed-off-by: Alex Bennée <alex@bennee.com>
Merge pull request #94 from stsquad/fix-bpaste

lui-autopaste.el: fix bpaste helper