Added channel options to can_produce_data and get_stream_gaps so get_required_channels can be used for XYZAlgorithm functionality

Intermagnet fixes

Changes to fix missing channel specification issues in XYZAlgorithm and StreamConverter, added a get_required_channels option

Merge branch 'python3-url-support' of https://github.com/jmfee-usgs/geomag-algorithms into jmfee-usgs-python3-url-support

Merge branch 'metadata_changes' of https://github.com/aclaycomb-usgs/geomag-algorithms into aclaycomb-usgs-metadata_changes

Switch base image, use conda-forge channel, remove version label

Average Algorithm counter in check stream to fix run-as-update issues

Add json output to CLI and update docs

Add Usage Documentation Page for the Web Service

Added unit tests for the web service

Unit tests to confirm that WebService.parse, WebService.fetch,
and _get_param to detect bugs and confirm that exceptions are
raised correctly.