Huge replace of old users_project and users_group references

app/assets/javascripts/admin.js.coffee

app/assets/javascripts/groups.js.coffee

app/controllers/admin/groups_controller.rb

app/controllers/admin/projects_controller.rb

app/controllers/groups_controller.rb

app/controllers/profiles/groups_controller.rb

app/controllers/profiles/notifications_controller.rb

app/controllers/projects/team_members_controller.rb

app/controllers/users_groups_controller.rb

app/finders/projects_finder.rb

app/mailers/emails/groups.rb

app/mailers/emails/projects.rb

app/models/ability.rb

app/models/concerns/notifiable.rb

app/models/group.rb

app/models/group_member.rb

app/models/member.rb

app/models/members/group_member.rb

app/models/members/project_member.rb

app/models/project_member.rb