Generate a small test database from the production DB and use it for
automated Travis testing
include postgresql in travis setup
Leave off grant/revokes from pg_dump - hoping for Travis success
Create objects in cfdm_test, not default database
regenerated test data set
Merge branch 'master' into tolerate_gaps
Assume running on test
Merge pull request #87 from 18F/tolerate_gaps

API unit tests now run in Travis