Moved devilry_examiner to devilry.devilry_examiner.

See #629.
Removed devilry.devilryadmin module.

No longer in use. See #630.
Removed devilry.adminscripts module.

No longer in use. See #630.
Updated devilry_run_all_test.py for the new location of devilry.devilry_examiner.

See #629.