Expose registered resource classes (for introspection)

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Don't bother converting strings

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Document property types

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Oops

I have no idea why this snuck in with the original Travis commit or what
my intentions for it were.

Signed-off-by: Stephen Celis <stephen@stephencelis.com>