New benchmark: Curacao

Hi, here's a pull request to add Curacao to your benchmark test suite.

Changes overview:

* Added Curacao 2.5.3 benchmark with all required benchmark configurations in place &mdash; currently supports the "json" and "plaintext" tests only.
* Upgraded `sbt-launch.jar` to SBT version 0.13.2 (fully backwards compatible with previous SBT versions)
* Tested `setup.py` on OSX and Ubuntu Linux to verify things load and start correctly.

Thanks,
-Mark