Gets User+Groups together in 1 GET call (WIP)

The group stores have to change now. We will need to read the data off
of the user store and fill in the groups stores accordingly rather than
having 2 GET calls to fill stores that correspond to ones the user has
created and ones the user is a member of – they are not distinct sets
but its convenient to have them in separate stores with a third store
that has all of the groups, which will be a unique superset