amendment to 'Feature/reverse relation between excerpt and bounding geometry': Fix NULL constraint violation, work around Django migration bug
Created by: das-g
- d878efc4 makes a change I should have made with #66 already and fixes the NULL constraint issue that remained after ff5eadd7 (#69)
- 6696c3ca is essentially the same as ff5eadd7 (#69) and works around #70 (closed)