.bash_prompt: Add back escape sequences

Fixes #403.
.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.
update default editorconfig
disable tab completion for many bash commands as it is causing tab completion issues
Merge branch 'master' of github.com:mathiasbynens/dotfiles into upgrade

# By Mathias Bynens (3) and April Arcus (1)
# Via Mathias Bynens
* 'master' of github.com:mathiasbynens/dotfiles:
  .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
  .bash_prompt: Add back escape sequences

Conflicts:
	.vimrc