Implement Tensorflow model on Egil's features

[bitsofbits]

Tim will implement this model in https://github.com/GlobalFishingWatch/vessel-scoring/issues/39

• [ ] Evaluate and play with model (Egil)
• [ ] Add is_daylight as a feature and see how it works.

[enriquetuya]

@redhog this one is low priority on sprint-20 and 21