A classification training lists

[bitsofbits]

• added classification training lists (a csv file)
• added tests to ensure that any csv files are sorted by MMSI and have unique MMSI

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• Current name is GFW\CLASSIFIER\TRAINING\YYYYMMDD.csv. I'm inclined not to worry about the vessel scorer since it is classifying points not vessels, so isn't likely to end up in treniformis. I'm open to name suggestions though,
• I test that csv files are sorted by MMSI and have unique MMSI. Is there anything else that needs
  to be done to make diffs work smoothly?

[bitsofbits]

We've decided to put this file somewhere (nn-vessel-classification) instead