Update pv1.js (#10)
Update pv1.js (#10)

Patient Class `PV1-2: Patient Class (IS)` is missing. Thus all following fields are parsed wrong.
http://hl7api.sourceforge.net/v251/apidocs/ca/uhn/hl7v2/model/v251/segment/PV1.html
evanlucas/nodengine-hl7