Added new USB_DeviceState variable to keep track of the current Device mode USB state.

Added new Endpoint_ClearStatusStage() convenience function to assist with the status stages of control transfers.

Removed vague USB_IsConnected global - test USB_DeviceState or USB_HostState explicitly to gain previous functionality.

Removed USB_IsSuspended global - test USB_DeviceState against DEVICE_STATE_Suspended instead.

Fixed possible enumeration errors from spinloops which may fail to exit if the USB connection is severed before the exit condition becomes true.

Demos/Host/Incomplete/BluetoothHost/Lib/BluetoothStack.c

@@ -41,7 +41,7 @@ Bluetooth_Device_t     Bluetooth_DeviceConfiguration ATTR_WEAK =
 
 void Bluetooth_Stack_Task(void)
 {
-	if (!(USB_IsConnected) || (USB_HostState != HOST_STATE_Ready))
+	if (USB_HostState != HOST_STATE_Configured)
 	  Bluetooth_HCIProcessingState = Bluetooth_Init;
 		
 	Bluetooth_ProcessHCICommands();