Compliant with package.el format

The purpose here is to prepare for easy distribution via
package.el (melpa, marmalade...). The format is described here:
http://marmalade-repo.org/doc-files/package.5.html

Totally arbitrarily, I decided it wasn't version 9999 anymore but 0.1.0.

I commented out the (require 'evil-leader) as this doesn't seem
necessary anymore.