.bash_prompt: Interpret escape sequences correctly in all cases

Closes #407.
.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.
.vimrc
- disabled colorscheme

.bash_profile
- escaped variable
Merge commit '287f38e2196d8367cf2cb33b6f75860dbf17492a'

* commit '287f38e2196d8367cf2cb33b6f75860dbf17492a':
  .aliases: Remove the now-broken `whois` alias
  .vimrc: Avoid creating backups when editing files in `/tmp`
  .bash_prompt: Interpret escape sequences correctly in all cases

Conflicts:
	.bash_prompt