Merge pull request #817 from ClusterHQ/noop-scheduler-235

Force the use of noop ioscheduler in tutorial vagrant vms

Authors: @wallrj, @ryao
Reviewer: @exarkun

Fixes #235
Bumped version numbers
Updated NEWS
Merge pull request #849 from ClusterHQ/release/flocker-0.2.1

Release Flocker-0.2.1

Author: @wallrj
Reviewer: @adamtheturtle 

Fixes #847