ProjectViewSet tests
Add instruction how to install Sphinx
Introduce Sphinx and link to install guide
Avoid errors if MULTIPLE_APP_SERVERS isn't set
Merge pull request #931 from malept/multiple-app-servers-unset

Avoid errors if MULTIPLE_APP_SERVERS isn't set
Add good first bug docs
proposed fix for #919 (missing pdf index)
Add contributing doc
all tests now pass with updated test_data.json
Update symlinks.rst: Minor typo correction.

out -> our
Update symlinks.rst: Typo correction.

line 78: Add apostrophe.
Merge pull request #941 from jet-sun/patch-1

Update symlinks.rst: Minor typo correction.
Merge pull request #942 from jet-sun/patch-2

Update symlinks.rst: Typo correction.
Updated translations
Merge pull request #937 from nolta/patch-1

proposed fix for #919 (missing pdf index)
Merge pull request #935 from vlad8/more_tests

ProjectViewSet tests
Merge pull request #930 from hickford/patch-1

Add instruction how to install Sphinx
Fix missing pdf file handling
remove solr subsection from developer documentation
Merge pull request #956 from jaspeers/remove-solr-doc-refs

remove solr subsection from developer documentation