discard stdout and stderr when running zfs list
remove the temporary test I was using to check that this works
Squashed commit of the following:

commit b51f5f8bf3bd6b157a14ab82ce25afe842fa0847
Author: Richard Wall <richard.wall@clusterhq.com>
Date:   Tue Aug 5 17:58:43 2014 +0100

    Link to the flocker-cli installation instructions

commit 9f970413e69ac798ebac48f1456ae1cbcfa04bad
Author: Richard Wall <richard.wall@clusterhq.com>
Date:   Tue Aug 5 17:57:28 2014 +0100

    A further note about disk space requirements

commit 70e869edb10228b015c6c6b2a766981b9dc9858d
Author: Richard Wall <richard.wall@clusterhq.com>
Date:   Tue Aug 5 17:52:37 2014 +0100

    Add a note about minimum disk space requirements

commit dafa40a5ba2a18f1aa836fc2f814f18f95fe2ea0
Author: Richard Wall <richard.wall@clusterhq.com>
Date:   Tue Aug 5 17:11:34 2014 +0100

    remove the temporary test I was using to check that this works

commit 0b69d2fc27738fb60bc2221c59f5590dbdbd4aad
Author: Richard Wall <richard.wall@clusterhq.com>
Date:   Tue Aug 5 17:10:56 2014 +0100

    discard stdout and stderr when running zfs list
Use canonical twistedmatrix.com domain
Link to production clusterhq docs
Merge pull request #438 from ClusterHQ/tutorial-disk-space-requirements-422-2

Add notes about the disk space required by the tutorial virtual machines.

Fixes #422.
Merge pull request #434 from ClusterHQ/zfs-list-402

Discard the stdout and stderr of zfs list.

Fixes #402.
Fix a remaining reference to doc-dev
Fix a broken link found by sphinx linkcheck
I screwed *all* those links up! Try again.
Merge pull request #441 from ClusterHQ/readme-links-360

Fix various links in the README file.

Fixes #360.
Merge remote-tracking branch 'refs/remotes/origin/master' into docs-reorg-419
Update links to new location.