add a return parameter in order to let the processed offices_form return the user to a natural location
update delete.phpp to use rtn parram
update delete.phpp to use rtn parram
add a new inheritance tree root containing methods that can be used by all classes, not just those descending from sgedatabaseobject
add voter class
some class voter-related changes
refactor election model to refer to a UES semester id, rather than 'year' and 'sem_code'; adds lib fns for both voter and elections changes
some loose ends: gpl, new attribute in ballot, require that needs to be removed
update tests and lib fns to pass unit tests
yet another place where the election refactor has effect
update some requires; add some comment