update LICENSE

LICENSE

@@ -217,6 +217,11 @@ Arduino-LMIC Library
 TTN OTAA Example
 https://github.com/matthijskooijman/arduino-lmic/blob/master/examples/ttn-otaa/
 
+and it's fork
+
+LoraWAN-in-C library, adapted to run under the Arduino environment
+https://github.com/jpmeijers/arduino-lmic
+
 under this Licence:
 
 "License

src/main.cpp

@@ -100,7 +100,7 @@ void os_getDevEui (u1_t* buf) {
 }
 
 // LMIC enhanced Pin mapping 
-const lmic_pinmap lmic_pins = {
+extern const lmic_pinmap lmic_pins = {
     .mosi = PIN_SPI_MOSI,
     .miso = PIN_SPI_MISO,
     .sck = PIN_SPI_SCK,