Moving groovy classes to groovy directory.
Converted other remaining java files to groovy.
Switch to use Groovy Sql.
Updated gitignore.
Re-created IdGeneratorTest in Groovy.
Default SMTP server is localhost.
Partially ported DBUtils.

- A lot of functionality isn't needed thanks to groovy.sql.Sql.
Using groovy.sql.Sql.
Made this slightly more portable.

- Perhaps this could be better done via JPA or something?
Ported a test class.