Add PostcodeAnywhere api error responses
Rename fixtures with Postcode Anywhere API version prefixed
Add minimal PostcodeAnywhere UK geocoding provider
Test PostcodeAnywhere Uk geocoding provider tests
It appears that we have to implement the 'city' method on the 'Results' object too
Rename PostcodeAnywhere UK fixtures
Specify the PostcodeAnywhere Uk default fixture
Add underscore to separate PostcodeAnywhere version identifier on fixtures
Add PostcodeAnywhere API error handling; Map key limit exceeded, invalid key to Geocode errors and call all others as just Error
Handle responses that only have one component in the Location field, assume this is a county and so return blank city
Add some PostcodeAnywhere API documentation to lookup and result impl
Add postcode_anywhere_uk lookup
Add README lookup section for postcode_anywhere_uk
return OS GridReference as explicit method rather than part of address
Merge pull request #730 from rob-murray/add-postcode-anywhere-uk

Add :postcode_anywhere_uk lookup.