V2.1

[IreLynn]

Contains a number of significant updates, including the following:

• Djoser submodule updated from release 0.4.0 to release 1.1.5 from Sunscrapers
• Restructured serializers for samples and chemical analyses, aimed at cleaner delivery of data to frontend
• CSV rendering option for samples and chemical analyses: adding '&format=csv' to any query delivers a CSV file containing the query results
• More options for sorting query results
• Integration of images (image migration from legacy database, addition to serializers for samples, subsamples, chemical analyses)
• Re-implemented bulk upload of samples and chemical analyses so that they work and expect files to be formatted in the manner described in the old wiki

Persisting issues/to-do's that we are currently aware of (logged in issues):

• Djoser is now on release 1.5.1; should update and verify that everything still works as expected
• Legacy images have been migrated and fully integrated, but new image upload/bulk upload has not been tested
• Bulk upload for samples and chemical analyses require further testing and tweaking to verify that all errors are being handled appropriately and delivered to the frontend in a way that is useful (for front-end data table display)
• Wiki needs to be updated to reflect revised serializers, mention CSV export, and include instructions for bulk upload file formatting
• Install script does not work out of the box. Need to look into this, and determine what needs to be updated in the script & instructions on the wiki

Changes implemented by @bdrumheller and @IreLynn between February 2018 and May 2019.