One ~/.env to rule them all (and a proper $PATH in zsh, finally).

It turns out that you can't name your own variable `path`. It just
starts acting weird. So `p` it is for now and everyone is happy (kind
of).

Also, [pandoc](http://johnmacfarlane.net/pandoc/) compiled again!
~/.config/awesome/rc.lua: Use slock.
~/.config/awesome/rc.lua: Add shortcut to take screenshots.
~/.config/awesome/rc.lua: Log window titles to eventstream.

This is a temporary solution, see
https://github.com/heyLu/lp/rust/keylog-xlib.c for my attempt to do this
on my own.
~/{.config/gtk-3.0,.gtkrc-2.0}: Add gtk theme settings.

For prettyness (or non-uglyness, whatever strikes your fancy).
~/.Xresources: Fix url selection.