Commented out git aliases.

Turns out `gc` is a command to show garbage collection on JBoss servers, so having an `gc` Git alias is a problem. Rarely use Git on OME servers, so commenting out all Git aliases for now.
changed executable directory color to be readable
Merge branch 'master' of github.com:zanshin/dotfiles

* 'master' of github.com:zanshin/dotfiles: (24 commits)
  removed no longer needed ssh config
  added tmux kill-session alias
  ST2 sure is noisy.
  added please alias for sudo !!
  new tmux aliases
  adding bash functions
  Revert to eb1aaf6
  added tmux alias, updated ST2
  Added vim-snipmate and vim-snippets.
  Pesky ST2 last-run.
  Commented out Chef context bit from prompt.
  ST2 last run
  Added code to show current Chef repo context in prompt.
  Added wifi alias from http://brettterpstra.com/2014/02/15/quick-tip-automating-you-macs-wifi-power/
  some directory shortcuts
  Added Chef plug-in to ST2.
  Added Control-P bundle.
  Altered settings for zsh auto-correct.
  cleaned up vimrc
  Changed test for rbenv.
  ...