AppConfigHeaders: Switch class driver Device mode demos to use LUFAConfig.h configuration header files.

AppConfigHeaders: Switch low level Device mode demos to use LUFAConfig.h configuration header files.

AppConfigHeaders: Switch class driver Host mode demos to use LUFAConfig.h configuration header files.

AppConfigHeaders: Switch DualRole and low level Host mode demos to use LUFAConfig.h configuration header files.

AppConfigHeaders: Remove outdated incomplete BluetoothHost demo - updated Bluetooth stack code is in the ExplorerBot project (http://www.fourwalledcubicle.com/ExplorerBot.php).

Fixed compile error with the unreleased ATMEGA32U6 device.

AppConfigHeaders: Update several additional user projects to use configuration header files, rather than makefile defines. Remove compile time warnings for projects lacking device serial support, remove incomplete StandaloneProgrammer project.

AppConfigHeaders: Update several additional user projects to use configuration header files, rather than makefile defines.

AppConfigHeaders: Update several user projects to use configuration header files, rather than makefile defines.

AppConfigHeaders: Update bootloaders to use configuration header files, rather than makefile defines.

Fix broken documentation in the CDC and DFU class bootloaders due to Doxygen's confusion over the ATTR_NO_INIT attribute macro.

Add branch for the conversion of demos to use standard C header files for configuration, rather than makefile defined macros.

Speed up build tests by only building each test to the ELF output stage (when all files are compiled and linked), rather than to the full HEX output stage as the resulting binary is not actually required.

Changed board LED driver implementations of LEDs_ToggleLEDs() for the AVR8 architecture to use the fast PIN register toggle alternative function for speed.

Fixed broken MIDI host driver MIDI_Host_ReceiveEventPacket() function due to not unfreezing the MIDI data IN pipe before use (thanks to Michael Brown).

Increased endpoint polling interval for all demos and projects to 5ms, as 1ms was causing some enumeration issues on some machines (thanks to Riku Salminen).

Add additional preprocessor sanity checks for the XMEGA platform based on the USB controller input clock speed.

Fixed possible deadlock in the CDC device driver if the USB connection is dropped while the CDC_REQ_SetLineEncoding control request is being processed by the stack (thanks to Jonathan Hudgins).

Fixed incorrect DFU version number reported to the host in the  DFU bootloader descriptors. Fixed incorrect version hundredths value encoding in VERSION_BCD() macro (thanks to Georg Glock).

The library bootloaders will now correctly start the user application after a watchdog-based application start, even if the /HWB line is held low externally during the reset phase.