CLI: accept --schema for all commands
CLI: require user to enter name of database for each command

I found myself stomping on databases when loading data into non-PostgreSQL
RDBMSs because in other RDBMSs, vocabulary and CDM live in separate
databases instead of separate schemas.
Loader: fix header issues with #slow_load option
Merge branch 'feature/mssql' into develop
Version: bump to 0.0.3
Merge branch 'release/0.0.3'
Merge tag '0.0.3' into develop

Fix issues with slow-load method
Merge upstream changes