Fixing corner case in local anomaly detectors trained with one row

Fixing http response handling for python3

Fixing problems with prediction ephemeral resources

Version update

Adding REST methods for external connectors and allowing sources to u…

…se them

Also:

- Adds new short debugging logs facilities
- Updates underlying bigml-chronos version

Fixing input data modification in local predictions

Fixing tasks status for organizations

Adding Cython to modules installed in tests

Improving exception handling when retrieving a resorce

Removing repeated test examples