Medium Mode added

MediumMode: Bw 125 Cr 4/8 SF 10 (1024 Chips/Symbol)

lib/BG_RF95/BG_RF95.cpp

@@ -25,6 +25,8 @@ PROGMEM static const BG_RF95::ModemConfig MODEM_CONFIG_TABLE[] =
     { 0x72,   0xc7,	   0x8},	// BG 125 cr45 sf12
     { 0x72,   0xb4,    0x00}, // Bw125Cr45Sf2048 <= M0IGA messup speed
     { 0x76,   0x94,    0x04}, // Bw125Cr47Sf512 <= corrected 1200baud
+    { 0x78,   0xa4,    0x00}, // Bw125Cr48Sf1024
+    
 };
 
 BG_RF95::BG_RF95(uint8_t slaveSelectPin, uint8_t interruptPin, RHGenericSPI& spi)

lib/BG_RF95/BG_RF95.h

@@ -549,6 +549,7 @@ public:
 	Bw125Cr45Sf4096,                ///< APRS 
     Bw125Cr45Sf2048,                ///< M0IGA Messup speed / 698baud (not 1200)
     Bw125Cr47Sf512,                 ///< corrected 1200 baud
+    Bw125Cr48Sf1024,                /// Bw 125, Cr = 4/8, Sf = 1024chips/symbol, CRC on
     } ModemConfigChoice;
 
     /// Constructor. You can have multiple instances, but each instance must have its own