On renome le module upnp pmoupnp pour homogénéiser le tout

pmoupnp/devices/services/statevariables/statevariable_cmp.go

@@ -0,0 +1,13 @@
+package statevariables
+
+func (sv StateVariable) Cmp(a, b interface{}) (int, error) {
+	return sv.valueType.Cmp(a, b)
+}
+
+func (sv StateVariable) Equal(a, b interface{}) (int, error) {
+	return sv.valueType.Cmp(a, b)
+}
+
+func (sv StateVariable) InRange(val interface{}, interval *ValueRange) (bool, error) {
+	return sv.valueType.InRange(val, interval)
+}