Online prediction service

[edvardlindelof]

One example using GClouds TensorFlow-support and one of a plain python service

[edvardlindelof]

on branch onlinePredictionTest: working dummy example of scala-code requesting a prediction via a dirty python service that in turn calls the tensorflow-model. The java-api for ml-requests has no examples and seems incomplete so calling it directly from scala would mean having to fiddle with the raw rest-requests, I think.