Order plugin items and add `vagrant` plugin
[global] Move to `rbenv`

After that I got `dyld: Library not loaded` error when editing git
commits in vi.

Reinstalling vim seems to fix the issue.
[iterm] Update settings

* Dim unused pane font
* Remove scroll bar
[global] Update / remove comments
[zsh] Update plugin list

* Drop rvm
* Add autojump
[README] Add instructions for `autojump`
[zsh] Introduce autojump settings

The settings load `autojump` properly into the config after I had some
issues with `autojump` and `oh-my-zsh`.
[tmuxinator] Update config

Add `rbenv` support and update paths
[osx] Introduce default settings for Mac OSX

Here I collect `default` settings that I find useful.