restructure ui layout

pom.xml

...ringframework/samples/petclinic/PetClinicApplication.java

...pringframework/samples/petclinic/web/CrashController.java

.../springframework/samples/petclinic/web/OwnerResource.java

...rg/springframework/samples/petclinic/web/PetResource.java

...ringframework/samples/petclinic/web/PetTypeFormatter.java

...g/springframework/samples/petclinic/web/PetValidator.java

...rg/springframework/samples/petclinic/web/VetResource.java

...pringframework/samples/petclinic/web/VisitController.java

...g/springframework/samples/petclinic/web/package-info.java

src/main/resources/application.properties

src/main/resources/cache/ehcache.xml

src/main/resources/cache/ehcache.xsd

...main/resources/dandelion/datatables/datatables.properties

src/main/resources/logback.xml

src/main/resources/spring/business-config.xml

src/main/resources/spring/data-access.properties

src/main/resources/spring/datasource-config.xml

src/main/resources/spring/mvc-core-config.xml

src/main/resources/spring/mvc-view-config.xml