Merge pull request #30 from GoIntegro/feature/api-59-to-one-urls

[API-59] To one relationship URLs
Merge pull request #34 from GoIntegro/feature/api-59-to-one-urls

[API-59] To one relationship URLs
Merge pull request #35 from GoIntegro/feature/api-59-to-one-urls

[API-59] To one relationship URLs