Bring Rakefile in line with documentation
Lint
Readme typos
WIP: trying to set up a backdrop_collector class
Fix creation of backdrop_collector directories
Lint
Install git on the backend machines

Git is required to install some pip dependencies for collectors
on the backend machines.
Tidy up backdrop_collector puppet

Thanks @tombooth!
Merge pull request #39 from alphagov/deploy-collectors

Set up directories for deploying collectors