Fixed swapped Little Endian/Big Endian endpoint and pipe write code for the UC3 devices (thanks to Andrew Chu).

Fix incorrect definition for the XMEGA Endpoint_BytesInEndpoint() function when used on OUT endpoints.

Oops - mask out the endpoint address direction when comparing the IN and OUT endpoint indexes in the AVRISP-MKII clone and XPLAINBridge projects.

Fix AVRISP-MKII clone and XPLAINBridge projects not properly configuring the AVRISP IN endpoint when needed if RESET_TOGGLES_LIBUSB_COMPAT compile time option is used.

Turn off watchdog before jumping to the user application in the DFU and CDC based bootloaders, for the specific case of /HWB being low during reset (where the bootloader will re-enter).

Alter the XPLAINBridge and AVRISP-MKII clone projects so that the descriptors from the AVRISP-MKII clone project can be directly used in the XPLAINBridge project. Add support for RESET_TOGGLES_LIBUSB_COMPAT option in the XPLAINBridge project.

Added new RESET_TOGGLES_LIBUSB_COMPAT compile time option to the AVRISP-MKII clone programmer project (thanks to Robert Spitzenpfeil).

Additional fixes to the MIDI host driver due to not unfreezing/re-freezing pipes correctly (thanks to Michael Brown).

Upgrade Doxygen configuration files for Doxygen 1.8.1, fix broken stylesheet and footer HTML, add explicit spacing into documentation code fragments to prevent Doxygen from removing empty lines in the output.

Minor documentation adjustments to the demos, projects and bootloaders to ensure correct formatting of application device support.

Update project Doxygen and makefiles so that the resulting project documentation hides the unused version value, and uses the same HTML CSS stylesheet as the library core.

Clean up and speed up build tests by turning off expensive and slow size optimizations, and generation of assembly listings (*.lst) for each compiled source file.

Fixed compile error with the unreleased ATMEGA32U6 device.

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

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.