Bumped CDH5 to 5.2.0 and Mesos to 0.21.0
Merge pull request #38 from theclaymethod/bump-cdh5-version

Bumped CDH5 to 5.2.0 and Mesos to 0.21.0
Merge branch 'master' into feature/fluid-task-trackers

Conflicts:
	README.md