Add user editable keys to device API.
Merge pull request #94 from MastodonC/feature/devices-api-fix

Don't allow the user to update internal data.
Ignore user_metadata for synthetic readings.
Merge pull request #95 from MastodonC/feature/synthetic-readings-fix

Ignore user_metadata for synthetic readings.
Bump alia and thus the datastax driver.
Merge pull request #96 from MastodonC/feature/alia-update

Bump alia and thus the datastax driver.
Smaller page size for batches.

To avoid write timeouts we're experiencing.
Merge pull request #97 from MastodonC/feature/measurement-smaller-pages

Smaller page size for batches.
wip: not yet working form to upload profiles.
Make index-malformed? a multimethod.