Updated all host mode demos and projects to use the EVENT_USB_Host_DeviceEnumerationComplete() event callback for device configuration instead of manual host state machine manipulations in the main application task.

Added new USB_Host_ConfigurationNumber global variable to indicate the selected configuration in an attached device.

Renamed global state variables that are specific to a certain USB mode to clearly indicate which mode the variable relates to, by changing the USB_* prefix to USB_Device_* or USB_Host_*.

Removed the HOST_STATE_WaitForDeviceRemoval and HOST_STATE_Suspended host state machine states, as these are no longer required.

Altered the USB_Host_SetDeviceConfiguration() function to update the new USB_Host_ConfigurationNumber global as required.

Moved out the Host mode standard request convenience/helper functions from the architecture specific Host driver files to the architecture agnostic HostStandardReq.c driver file.

LUFA/ManPages/FutureChanges.txt

@@ -24,7 +24,8 @@
   *      -# Abstract out Mass Storage byte send/receive to prevent low level API use in projects
   *      -# Consider switch from endpoint numbers to full endpoint addresses to ease future architecture expansion
   *      -# Fix HID report parser usage support for array types
-  *      -# Remove need for direct user Host State Machine interaction in the Host mode applications
+  *      -# Mass Storage Host demo incompatibilities with some devices
+  *      -# Add additional standard request helper functions to host mode
   *  - Documentation/Support
   *      -# Add detailed overviews of how each demo works
   *      -# Add board overviews