Update ember app organization and user relationships to use ember-data many to many relationships
Fix organizations and users w/ memberships.  Keep membership exposed to ember as ember-data can't really create many to many relationships.  Added some more tests
More changes to the ember app around memberships
Updating to use latest rvm .ruby-gemset/.ruby-version replacement for .rvmrc
Merge branch 'organizations-refactor' of github.com:Andrewmp1/yourjargon
Merge pull request #98 from Andrewmp1/organizations-refactor

Organizations refactor
Merge branch 'master' of github.com:Ember-SC/yourjargon
Merged Drew's PR 99