Modified routing and favicons

This standardizes on .ICO favicons in the root of the site. Also cleanup
of routes.py files, but the app routes in webapp/ and the template for
site-wide routing (SITE.routes.py).
Merge pull request #97 from OpenTreeOfLife/simple-curation-app

Modified routing and favicons
Merge remote-tracking branch 'origin/master' into cloud
Further progress on automated install