Send a minimal manual to the content store
Send maximal manuals to the content store

This now adds base_path to child sections.
Separate content store concerns from the input
Move base_path methods onto ContentStoreManual class

This encapsulates knowledge about the content store and the location
of manuals on GOV.UK in one place.
Send maximal manual sections to the content store

The example section had itself as a child, so we have updated the
child section's id to 123456.
Handle the content store being unavailable
Pass content store status code through in success case
Refine content store error condition handling
Add basic specs for content store models

Having basic specs means there is less friction for adding unit specs when the
class gains complexity and deserves extra specs.
Merge pull request #30 from alphagov/send_data_to_content_store

Send data to content store