Metadata Filtering

[BryonLewis]

resolves #21

• Script for processing input/output folders, uploading to data.kitware.com and creating an ingest JSON file from that data including metadata.
• Adding of metadata: tags to files that should be pushed into the Layers themselves. This would be a way to filter layers without worrying about the hierarchy of Context -> Dataset -> Layer.
• Tags are key value pairs for items that wish to be filtered by
• Added endpoints for metadata filtering to provide a list of the Filter options and their values, as well as a way to filter layers

TODO:

• Ingestion script for some of the Outputs isn't working properly. I believe this has to do with some 0-360 longitude errors when processing from a JSON file.
• Structure the return data from the filtering so it is easier to visualize in a list. I.E return some indicating of the values that match in the type list and show the types that are available
• Fix filtering for Null or missing values
• Make sure the filtering works so it finds all matches
• UI for filtering map layers
  • The base filtering options provides a list of the keys and their possible values.
  • Values can be multi-selectable so you can select several values at once.
• Filtering Styling to compress the options for the different values, maybe a searchable field