Add star states

* Add state(int) field to star model
* Add get_state, set_state methods to star model
* Add STAR_STATES constant to nucleus
Only change state to 'deleted', don't actually delete on star deletion
soma => souma
Only display Stars with state >= 0
Display star state in debug view

* Add a column `state` to debug view
* Conditionally display delete button if state >= 0
Handle delete requests for Stars

* Had to disable Starmap handling until better implementation of it