Remove teratorn dep, move field defs into gulo.fields
Pull in util functions from Teratorn
Remove references to teratorn, update ns to use new fields, utils functions
Update formatting, tweak views to use harvestid instead of id per new schema
Update tests to include functions from Teratorn, remove refs to teratorn as dep
Change to include 500 occs of ttrs_mammals using latest harvesting schema
Update views tests to reflect new test data source
Merge pull request #68 from VertNet/feature/remove-teratorn-dep

Purge teratorn from gulo! Update w/latest harvest schema!