Drush grant RID

This is a simple drush 6.x plugin that grants and revokes user roles based on RID instead of name. I wrote this because of issues with bash assembling a drush command and invoking it when the role name had a space in it. This caused issues with drush parsing the name into multiple arguments broken out based on the space between them regardless of encapsulation. This is an easier fix then that.

It's also useful if you know the RID / make an RID during an operation and want to use that instead.