User contributed annotations (FastFinder, Zooniverse)

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• [x] Document the plan of action
• [x] Build models and supporting software ( @RoyWilliams )
• [x] Prototype sprint end October ( @mFulton07, @smarttgit, @genghisken, @RoyWilliams)
• [x] Modify query builder and checker for annotation queries
• [x] Make annotations available to streaming queries
• [x] Extend API to allow annotation push ( @genghisken, @thespacedoctor)
• [x] Make it easier to develop annotators without waiting for alerts
• [x] Create annotator class which streams annotations immediately

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@mFulton07 to test in advance of prototype sprint

[tms-epcc]

@RoyWilliams completed this. See pull request https://github.com/lsst-uk/lasair-lsst/pull/123