application updates

- doc note: AESApplicationService.svc.cs is where URLs are directly tied
to... (e.g. parameters like id)
- added: [WebGet(UriTemplate = "?first={first}&last={last}&ssn={ssn}")]
to ServiceContract of IEmploymentService and IEducationService(using
System.ServiceModel.Web;)
- example url with multiple parameters:
http://localhost:51309/api/Employment?first=test&last=test2&ssn=1234
- updated: Controllers/API/EmploymentController.cs and
Controllers/API/EducationController.cs to match get by first/last/ssn
updates
- updated sql: Applicant_ID (no longer unique... otherwise we can't have
multiple employment history rows for a single applicant...)
- fixed: application create (all fields saving)