improvements, start integration tests

improved various funcs, removed extraneous things (e.g. Item.Attrs).

first integration test. more will come.

service_funcs_test.go

@@ -0,0 +1,15 @@
+package gosecret
+
+import (
+	`testing`
+)
+
+func TestNewService(t *testing.T) {
+
+	var err error
+
+	if _, err = NewService(); err != nil {
+		t.Fatalf("could not get new Service via NewService: %v", err.Error())
+	}
+
+}