Update oh-my-zsh
[vim] add tabular plugin
[tmux] remove osx-specific stuff and change zsh path
[git] add heroku account
[zsh] remove bundler plugin
Fix install script
Remove oh-my-zsh
Fix grepping in install script
[tmux] update keybindings and colors in status line
[zsh] replace oh-my-zsh with simple custom setup (thanks @sickill)
[vim] remove plugin group comments and osx-specific setting