README: Clarify that it doesn’t matter where the repository is cloned, and document ~/.extra
README: Tweak the part about ~/.extra
.bash_prompt: Add screenshot URL
.bash_profile: Be sure to source `.bash_prompt` first, in case it sets the PATH and subsequent dotfiles rely on it
.aliases: Use `sudo` to empty local trash as well
nerfing .vimrc's setrelativenumber and undodir options in case of older vim version
Merge branch 'mathias'

# By Mathias Bynens (5) and Paul Irish (1)
# Via Paul Irish
* mathias:
  nerfing .vimrc's setrelativenumber and undodir options in case of older vim version
  .aliases: Use `sudo` to empty local trash as well
  .bash_profile: Be sure to source `.bash_prompt` first, in case it sets the PATH and subsequent dotfiles rely on it
  .bash_prompt: Add screenshot URL
  README: Tweak the part about ~/.extra
  README: Clarify that it doesn’t matter where the repository is cloned, and document ~/.extra

Conflicts:
	.vimrc
	README.md