Fall back to GeoIP for incomplete search requests, closes #343.
Update cell docs with tighter lac/tac/nid ranges, refs #367.
Merge pull request #365 from hannosch/343-allow-halfempty-requests

Fall back to GeoIP for incomplete search requests, closes #343.
Create OCIDCellArea #348

- Create OCIDCellArea table/model
- Change update_lac to accept arbitrary models
- Change enqueue/dequeue LACs to accept arbitrary pipelines (not presently used)
- Populate with LACs on OCID import
- Add tests for OCIDCellArea Model
- Update OCIDCell import tests to test for the presence of OCIDCellArea entries after import
Merge pull request #366 from JaredKerim-Mozilla/348

Create OCIDCellArea #348