typo in migrate.clj
make all-measurents accept option for source cf

when migrating from the old measurements table to the new partitioned_measurements, we need to change the behaviour to load from :measurements
duplicate all-measurements as a disposable function
Merge pull request #50 from MastodonC/feature/migrate_measurements

Feature/migrate measurements
Mute session and security chatter.
Application route authn & authz rules

must be a user to get to /app for now
Better number filtering.
Removed unneeded logging.
Programmes filtered according to role & acl
Merge pull request #51 from MastodonC/feature/authz-update

Feature/authz update
Debugging redirect issue.
Quorum consistency on sessions to avoid problems.

Eventual consistency isn't great when you only check one server and keep
getting bounced around.
Only logged in users should access /app for now
Tidy up and fix of NPE on authz checking.
Merge pull request #53 from MastodonC/feature/security-extraction

Feature/security extraction
Session still not fixed.
Don't update metadata maps with nested nulls.

- Add more tests and assertions
Merge pull request #52 from MastodonC/feature/sensor-metadata

Don't update metadata maps with nested nulls.
Quorum consistency.
Might be able to survive with less consistency.