Refactor webapp-utils to scan config file.

This replaces the old (lame) version that had to explicitly piece
together fields by name, instead of faithfully capturing new values as
they're added to the conf file.

N.B. There's another copy of this file in 'curator/modules'. I should
either duplicate these changes there or (better yet) find a way to share
this module across both apps.
List all studies contributinging to synthesis.
Merge pull request #246 from OpenTreeOfLife/contributing-studies-page

Contributing studies page