Add Talk to Us from README
Start of linking to 'talk to us' from Tutorial
Start of putting get in touch URL in one specific help
Link to talk to us from flocker-deploy --help
Unrelated but I saw a full stop with an erroneous space before it
Link to talk to us from tutorial index
Merge pull request #514 from ClusterHQ/solicit-feedback-129

Solicit feedback.

Fixes #129.