This used to be GetType(), but since now things are "resources", we want
to know what "kind" they are, since asking what "type" they are is
confusing, and makes less logical sense than "Kind".
This simplifies the API, and reduces code duplication for most
resources. It became obvious when writing the pkg resource, that the two
operations should really be one. Hopefully this will last! Comments
welcome.
Naming the resources "type" was a stupid mistake, and is a huge source
of confusion when also talking about real types. Fix this before it gets
out of hand.