Modify dotfiles to work with Ubuntu and Parabola

Update all dotfiles.

* Remove extra line of whitespace at bottom of every file.

* Update all configuration files to work in Ubuntu. Most settings now
  function in Arch Linux, Parabola Linux, and Ubuntu.

* Add .xinitrc file to make starting gui easier. Use `xinit` on Ubuntu,
  or `startx` on Arch/Parabola Linux.

* Add .bash_logout file to clear screen after logout.

* Fix encryption in vim. The `blowfish` cryptmethod has security flaws
* so this change causes vim to use `blowfish2` instead when it is
* available (vim > 7.3).