Added a route from which a user can re-assign their group.
Added a route from which a user can re-assign their group.

kimchanyoung/nghborly,nyc-mud-turtles-2015/nghborly,kimchanyoung/nghborly,nyc-mud-turtles-2015/nghborly,kimchanyoung/nghborly,nyc-mud-turtles-2015/nghborly