Remove scan_lacs fallback code looking at new_measures, closes #354.
Updated to latest versions of alembic, billiard, celery and kombu.

Disable CELERYD_FORCE_EXECV as per celery changelog warning.
Downgrade irc to 9.0 as 10.0 drop Python 2.6 support.
Give all celery queues a prefix to better distinguish them in Redis.

Retain queues with the old name for one release, to make sure we
process any remaining jobs in those queues.
Create Cell Area Table (#349)

- Create CellArea table
- Add model tests
- Migrate cell area data from cell table to cell_area
- Change references from Cell table to CellArea table
Merge pull request #362 from JaredKerim-Mozilla/349

Create Cell Area Table (#349)
Retain table_args for CellArea model, whitespace :)
Update library dependencies again.
Explicitly call out data migrations as part of changelog.
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
In progress