Harmonized style with the primary OpenTree webapp.

Updated the less/README.txt file to explain how to prepare all web2py apps. Updated the index page template with a basic explanation of the curation tool and its relationship to GitHub. (This will change to a "dashboard" view for logged-in users.)
Merge pull request #84 from OpenTreeOfLife/simple-curation-app

Harmonized style with the primary OpenTree webapp.