support for roles (create, delete, list, edit) and role policies (add, delete, edit)
merged develop
WIP for adding role to launch_instance_wizard'
resolved conflicts
got launch instance wizard to look right with role selection included
merged develop
can now attach role to instance
merged develop
merged develop
merged develop
converted image caching to dogpilecache and memcached
merged develop
merged develop
added deps to setup.py
merged develop
merged develop
region no init'ed once. value not properly saved in cache, so create method always called
some hack to test simplifying the image objects going to the cache
able to cache some image sets, but many larger ones fail (at least size seems to be a factor)
merged develop