Made group name and description instance variables
Created spec for user joins a group
Created specs for user creates, edits, and deletes a group
Removed spec for user joins a group
Created spec for user requests to join group
Created edit, update, and destroy actions for groups; no authorization yet
Added moderator and memberships to group model, added authorization to controller
Added moderator functions to groups controller
Added user id for moderator to groups
Added logic for moderator editing and deleting group to show page
Fixed copy/paste errors and added .id and user_id
Fixed association
Added edit group template and created form
Fixed formatting on index page