Merge branch 'master' into shib-auth

client/html/user-guide/_images/wmts_masked.jpg

client/html/user-guide/_images/wmts_tiles.jpg

client/html/user-guide/_sources/downloading.rst.txt

client/html/user-guide/_sources/index.rst.txt

client/html/user-guide/_sources/intro.rst.txt

client/html/user-guide/_sources/sample-requests.rst.txt

client/html/user-guide/_sources/searching.rst.txt

client/html/user-guide/_sources/viewing.rst.txt

client/html/user-guide/_sources/web-client.rst.txt

client/html/user-guide/_static/alabaster.css

client/html/user-guide/_static/basic.css

client/html/user-guide/_static/custom.css

client/html/user-guide/_static/doctools.js

client/html/user-guide/_static/documentation_options.js

client/html/user-guide/_static/favicon.ico

client/html/user-guide/_static/file.png

client/html/user-guide/_static/jquery-3.4.1.js

client/html/user-guide/_static/jquery.js

client/html/user-guide/_static/language_data.js

client/html/user-guide/_static/minus.png