Updated XScreensaver config.

* Use `fortune -as` as text source
* Disable (almost) every screensaver pulling images (I don't have any)
* Enabled any remaining ones that didn't suck too much.
Workaround for urxvt home/end in scala REPL.
.zshrc $CONF overhaul
Merge branch 'master' of git://github.com/dwoffinden/dotfiles