Flesh out first tier of RightScale resources.
Flesh out first tier of RightScale resources.

Added method templates for resources that are directly available as
attributes of the RightScale class.  Each method aligns with a resource
"action" as documented in the RightScale API 1.5 reference
documentation:

    http://reference.rightscale.com/api1.5/index.html

diranged/python-rightscale-1,brantai/python-rightscale