Implement REST Interface for Relationships

We need to build a REST interface for Relationship data.

Subtasks:

[x] Provide Create, Read, Update, and Delete capabilities for Relationship entity
[x] Provide a distinct REST application context
[x] Support the JSON format at a minimum, add XML if you think it would be useful
[x] Develop a strategy to handle erroneous requests and error conditions scheme and implement it
[x] Use either the REST extension for Firefox or Postman (https://www.getpostman.com/) to test your REST API
[x] Create a subdirectory called RESTOutput and put screen snapshots of a GET request, POST request, and a request that has an error

littlefieldnick / DemographicSystemForHealthServer