Add user callback function to the Bluetooth host demo to filter out connections from remote devices. Add in ability to reject connections based on their bluetooth device address.

Clean up RelayBoard project code.

Make AVRISP project clear the XMEGA target's reset register twice; this does not appear to take affect properly the first time under some circumstances.

Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothHCICommands.h

@@ -83,6 +83,7 @@
 		#define EVENT_PIN_CODE_REQUEST                         0x16
 		
 		#define ERROR_LIMITED_RESOURCES                        0x0D
+		#define ERROR_UNACCEPTABLE_BDADDR                      0x0F
 		
 	/* Type Defines: */
 		typedef struct
@@ -191,6 +192,8 @@
 	/* Function Prototypes: */
 		void Bluetooth_ProcessHCICommands(void);
 		void Bluetooth_ProcessHCIEvents(void);
+		
+		bool CALLBACK_Bluetooth_ConnectionRequest(uint8_t* RemoteAddress);
 
 		#if defined(INCLUDE_FROM_BLUETOOTHHCICOMMANDS_C)
 			static uint8_t Bluetooth_SendHCICommand(void* Parameters, uint16_t ParameterLength);