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
Address review comment: Delete temporary validation code.
Address review comment: Typo.
Address review comment: Document exceptions that are part of the API.
Address review comment: Unicode.
Address review comment: Document character set rule for volume names.
Address review comment: Try to explain better what a namespace is and why you'd need it.
Fix failing test.
Merge remote-tracking branch 'refs/remotes/origin/master' into volume-namespaces-771