Add in a schema for customer satisfaction data
Rename customer_satisfaction to customer-satisfaction

- matches naming convention used elsewhere
- '_' name was failing, as query expected '-'
Tests for customer satisfaction schema

- lots more hamcrest
- tests that 'allOf' has been generated correctly
- tests defintions are set
- ensures 'required' list is set in 'customer-satisfaction' definiton
Add in schema for the realtime data-type

- requires 'for_url' and 'unique_visitors'
Add realtime-mowers to the schema fixtures

- mowing through data in real time
Remove duplicated assertion from customer-satisfaction test
Add tests for realtime schema

- checks required, definitions and 'allOf' aggregation
Merge pull request #159 from alphagov/realtimeschema

Add a schema for the realtime data-type