Updated test data to remove duplicated icode field
Support relying on teratorn for common functions, fields and columns
Removed core.clj - now rolled into teratorn.vertnet
Removed thrift.clj - no longer used
Remove core tests - no longer needed since core ns is gone
Removed functions now in teratorn; broke out harvest code into functions, added tests
Added access to teratorn.common functions
Simplified harvest functions/queries to facilitate testing; added tests
Merge pull request #64 from VertNet/feature/support-teratorn

new teratorn dep