[Fix #434] Correct ambiguity in the use of the term keymap
[Fix #411] Add Homebrew module
[Fix #452] Squash bugs introduced in fcab2a1
[Fix #459] Correct typos in the dpkg module
Merge branch 'master' of https://github.com/sorin-ionescu/prezto into mdh
* another attempt at my own prompt
* added new homebrew module