Extract wrapper script for downloading hadoop
Introduce end-to-end performance tests on the weather data

http://www.infochimps.com/datasets/global-daily-weather-data-from-the-national-climate-data-center-
Remove unused cluster KeyName

May be needed for ssh tunneling in the future, but not now.
Merge pull request #152 from ambiata/topic/ci-perf

Introduce end-to-end performance tests on medium-sized data