Fixed arguments of ParsePackage() in server to coincide with changes

made to parser.  This was missed due to the previously mentioned
disparity in import paths not causing install to break as would be
expected.

server/server.go

@@ -47,7 +47,7 @@ func generateHandler(w http.ResponseWriter, r *http.Request) error {
 	}
 	defer os.RemoveAll(dir)
 
-	pkg, err := parser.ParsePackage(dir, "")
+	pkg, err := parser.ParsePackage(dir, "", "")
 	if err != nil {
 		return fmt.Errorf("parse package: %v", err)
 	}