Worked on the reference widget/syntax
New files create the reference widget
in progress
Edited the ConfigEditor for the reference widget. It no longer produces its own syntax. There is also only one field, the reference itself, for users to input right now.
Edited the test for the edited widget
SWC-694: with working tab content type override for .tab and .tsv files, a verified regex, and fixed preview table style
SWC-694: add test around fixing the content type, and fix bug that a unit test caught
Merge pull request #437 from jay-hodgson/SWC-694

Swc 694
SWC-647: API key on settings page
new PLFM artifact
SWC-453 Created a reference widget

The widget inserts anchors that redirects to the footnote at the end of the wiki.
Test and new PLFM-artifact
PLFM-artifact
Merge pull request #438 from heidiso/develop

Added to formatting tips for new syntax.
Merge pull request #440 from dburdick/swc-647

Swc 647
SWC-453 Finished the reference widget

Made adjustments to the reference syntax to accept more formats.
Merge branch with ref widget implementation into develop