Add homebrew auto-completion for shell.
Set expandtab and enable per dir  .exrc file to over-ride vim settings.
Removed several inconsistencies with regard to naming of files.
Enable solarized (dark) theme for vim.
Improve README.
Merge branch 'master' of github.com:ashishb/dotfiles

* 'master' of github.com:ashishb/dotfiles:
  Update setup_new_mac_machine.sh
  Update setup_new_mac_machine.sh