Various pull requests adding test cases against the Sakila database

- [#2] Added source code generation for MySQL Sakila database
- [#4] Add generated JUnit test suite for queries against the Sakila database
- Added failing test cases for:
  - [#5] Incorrect camel-casing strategy when referencing generated classes
  - [#6] Incorrect code generated for DUAL table
  - [#7] Wrong column reference generated when column is not fully qualified