replace <blockquote> with a span tag.

ejabberd seems to strip this tag out, even though
XEP-0071 explicitly includes it in the recommended
list. Therefore, use <span> so we can at least style
it in this client.
Some more brevity in the XMPP status.
Ignore backup files ending in ~.
Make the quit button work again.

Hook up the quit button to the /quit command.
Forgot to remove fadeIn from init.
Remove unused javascript from the tree.
Merge branch 'master' of github.com:cburschka/cadence
Many markup and CSS improvements.

These improvements mainly involve various broken rules
in the custom styles. .row{Even|Odd} has finally been
removed everywhere; mostly replaced by a central rule
that adds a dark transparency via :nth-child.

the place of a system tray in the client's layout, and
doesn't actually contain options anymore).
The status icon has been moved into this tray.