Make built-in support more complete and extend it (next to current support of Oracle, CSV files and raw files) to:

• Oracle Exadata (check: already supported?)
• HIVE and/or Impala
• Widespread DBMS like MySQL et al. --> look at https://github.com/kennethreitz/records ("Database support includes RedShift, Postgres, MySQL, SQLite, Oracle, and MS-SQL (drivers not included).")
• (NoSQL is out of scope for now, focusing on dataframe-compatible data)

Maybe unify DBMS config attributes a bit (succumb to using a plain connect string?)