Now that the library has been updated, we can also update this.

Switched to codeload as we don't need the submodule anymore.

Various other Makefile consistency updates.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

This is the irssi-abi-8 branch that was not merged back to master but is
necessary for compilation. As it touches a submodule, I can't add a patch
for it. But I can backport all of the master commits.

Get rid of quasselc dependency as it's now a submodule.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

quassel-irssi is an irssi plugin that allows irssi to connect to
Quassel cores. Quassel is a distributed IRC client in which the
core can run independently and be connected to by quassel clients
over the network.

Signed-off-by: Ben Rosser <rosser.bjr@gmail.com>