Update CHANGELOG and Documentation

I've added all changes since 1.15 to the changelog, except all the BLE stuff. I'm not too sure what all the things were that have changed, so @schneider, if you can give me a rough list, I'll integrate them here as well.

epicardium/ble/ble.c

@@ -64,6 +64,7 @@ static bool log_enabled      = false;
 static int log_lastflushtick = 0;
 
 /*! \brief  Stack initialization for app. */
+extern void LlStackInit(void);
 extern void StackInit(void);
 extern void bleuart_init(void);
 extern void bleFileTransfer_init(void);
@@ -431,12 +432,15 @@ void vBleTask(void *pvParameters)
 	NVIC_EnableIRQ(RSV11_IRQn);
 
 	WsfInit();
+
 	taskENTER_CRITICAL();
 	/* Critical section to prevent a loop in iq_capture2 / meas_freq in
 	 * /home/maxim/Documents/src/BLE/mcbusw/Hardware/Micro/ME14/Firmware/trunk/NDALibraries/BTLE/phy/dbb/prot/ble/pan2g5/afe/max32665/board_config.c:275
-	 * if BHI160 and -Ddebug_prints=true is enabled*/
-	StackInit();
+	 * if BHI160 and -Ddebug_prints=true is enabled. See #115. */
+	LlStackInit();
 	taskEXIT_CRITICAL();
+
+	StackInit();
 	BbBleDrvSetTxPower(0);
 	setAddress();