Merge pull request #149 from OpenTreeOfLife/simple-curation-app

Cleanup for curator review (ongoing)
Merge remote-tracking branch 'origin' into simple-curation-app
Merge pull request #150 from OpenTreeOfLife/simple-curation-app

Improved OTU mapping UI and flow, cleanup of site nav and menus.
Merge branch 'master' into simple-curation-app
Improved UI for OTU mapping, incl. more feedback