Update README.md

Update getting started instructions.
Update README.md

Add auth configuration description.
Update User.php
Update README.md

Add model methods.
Update User.php

Use magic methods on query builder.
Update README.md

Show attributes, fillable and protected.
Update README.md

Add Contributing and license.
Update README.md

Remove capitalisation.
Update README.md
Update Models

Add assignRole and revokeRole methods to User model.
Add timestamps to pivot table.