.vimrc: Avoid creating backups when editing files in `/tmp`

See http://vim.wikia.com/wiki/Editing_crontab.
.aliases: Remove the now-broken `whois` alias

Closes #397.
Edited Terminal theme, removed unused themes

* Renamed init/Solarized Dark xterm-256color.terminal to init/Solarized
  Dark.terminal

* Changed font to Menlo Regular 11pt.

* Hid settings name in title

* Deleted init/Preferences.sublime-settings

* Deleted init/Solarized Dark.itermcolors