ADD to JS licensing for curator app
Another try using shared licenses.html
Remaining JS licensing for Open Tree curation app

NOTE that this uses a single set of "web labels" in licenses.html,
shared with the main 'opentree' webapp. This seems to work well, but
assumes that these apps are always installed in tandem.
Merge pull request #324 from OpenTreeOfLife/license-information-page

Adding JS licensing for curation app. Based on testing with LibreJS in various pages of both web2py apps, this satisfies #281.