Merge pull request #326 from Yaima/master

Implemented toggle() for locks

smartapps/smartthings/button-controller.src/button-controller.groovy

@@ -246,6 +246,9 @@ def toggle(devices) {
 	else if (devices*.currentValue('lock').contains('locked')) {
 		devices.unlock()
 	}
+	else if (devices*.currentValue('lock').contains('unlocked')) {
+		devices.lock()
+	}
 	else if (devices*.currentValue('alarm').contains('off')) {
         devices.siren()
     }