bin: Update to Bash 4.2.42
.osx: Fix typo

Ref. #183.
Merge branch 'master' of https://github.com/mathiasbynens/dotfiles

* 'master' of https://github.com/mathiasbynens/dotfiles:
  .osx: Fix typo
  bin: Update to Bash 4.2.42
Adding some needed packages
Adding some extra commands