Squashed commit of the following:

commit 844220f4f23a84aeda26fa184a48e68a3b97ed0d
Author: Andy Lister <andy@plasticcube.com>
Date:   Sun Nov 10 18:25:13 2013 -0500

    tweaked help message

commit e3652dd86070d4d192b180fb691c402795831812
Author: Andy Lister <andy@plasticcube.com>
Date:   Sat Nov 9 22:58:01 2013 -0500

    added release_type option

commit e84521e25748e33f11d3eebf8af7991965681a39
Author: Andy Lister <andy@plasticcube.com>
Date:   Sat Nov 9 17:50:19 2013 -0500

    added release_type as a param

Signed-off-by: Mattt Thompson <m@mattt.me>
[Issue #80] Supporting both release type names and numbers