Added new callback to the Audio Class driver to allow for endpoint control manipulations such as data sample rates.

Modified the Class Driver AudioInput and AudioOutput demos to support multiple sample rates.

Fixed KeyboardHost and KeyboardHostWithParser demos displaying incorrect values when numerical keys were pressed.

Fix broken LowLevel audio demo descriptors.

Minor documentation fixes.

LUFA/ManPages/FutureChanges.txt

@@ -28,10 +28,11 @@
   *      -# Write LUFA tutorials
   *  - Demos/Projects
   *      -# Device/Host USB bridge
-  *      -# Alternative (USB-IF endorsed) USB-CDC Ethernet Class
   *      -# Finish incomplete demos and projects
   *      -# Add class driver support for Audio Host class
   *      -# Add class driver support for Test and Measurement class
+  *      -# Add class driver support for EEM class
+  *      -# Add class driver support for ECM class
   *      -# Fix up Audio class support - add support for mixers, etc., add support for GET/SET commands
   *  - Ports
   *      -# Complete AVR32 port for existing devices, add UC3C support