Add a rake task to import Orgs, Sites and Hosts
Add Orgs, Sites and Hosts to rake import:all
Make data loading more consistent and complete

We don't display hit data anywhere yet, but we're starting to look at it.
Switch to a rake task for the git cloning
Fix typo
Roll up rake tasks into one for speed

Each invocation of Rake loads the Rails env, so this saves ~30seconds.
Merge pull request #34 from alphagov/rearrange_data_importing

Rearrange data importing