Basic carers allowance dashboard
Fix typo in title
Add realtime module

Copy from
http://alphagov.github.io/performance-platform/html-prototypes/page-per-thing-navigation/tax-disc--real-time-usage.html
Availability module
Update copy

Based on:
http://alphagov.github.io/performance-platform/html-prototypes/page-per-thing-navigation/tax-disc--speed-and-availability.html
Use deposit for foreign marrige as default monitoring data
Updating copy again

This time with the right stuff that Ed recommended:
https://www.gov.uk/performance/pay-legalisation-drop-off
Updated copy with Lizzie's initial suggestion
Update test for backdrop_stub responses