flip arguments in UI and in factory

data/web/index.html

@@ -128,7 +128,7 @@
     ];
 
     var FORM_SETTINGS_HELP = {
-      csn_pin : "'csn' for 'nRF24' interface, and 'PKT' for 'PL1167_LT8900' interface",
+      ce_pin : "'CE' for NRF24L01 interface, and 'PKT' for 'PL1167/LT8900' interface",
       packet_repeats : "The number of times to repeat RF packets sent to bulbs",
       http_repeat_factor : "Multiplicative factor on packet_repeats for " +
         "requests initiated by the HTTP API. UDP API typically receives " +

lib/MiLight/MiLightRadioFactory.cpp

@@ -6,7 +6,7 @@ MiLightRadioFactory* MiLightRadioFactory::fromSettings(const Settings& settings)
       return new NRF24Factory(settings.csnPin, settings.cePin);
 
     case LT8900:
-      return new LT8900Factory(settings.cePin, settings.resetPin, settings.csnPin);
+      return new LT8900Factory(settings.csnPin, settings.resetPin, settings.cePin);
 
     default:
       return NULL;