Uc91.1

This PR contains most of the main flow of UC 91. We created a new page PreRegisterPatient.jsp which contains a form where a user can preregister. On submission, the form data is handled by PreRegisteredPatientAction.java, which inputs this data into the DB.

Unit tests are included and can be run using the command: mvn test -Dtest=AddPreRegisterPatientActionTest