Implemented the vital list and created the ouputVitalList file to do so. renamed MultiKeyMap to VitalMultiMap.  I am using a a map that supports multiple keys from the apache commons-collection and I added the appache common collection to the project dependancy in the Build.scala file.  Updated the SearchController and EncounterHelper to work with the VitalMultiMap class i created
fixed VitalMultiMap So it returns the list of dates in sorted order from first to last. cleaned up code