Change the build system build module makefiles to have a set of sanity check macros they can call to verify user data. Add additional sanity checks.

Add new ATPROGRAM build system module. Add ATPROGRAM and CPPCHECK modules to all application makefiles.

Add explicit blank checks in the build system for user-set but blank variables that must not be blank.

Strip trailing slash from the user-supplied LUFA_PATH directory, to prevent double slashes from appearing in the commands/output.

Add missing documentation to custom BuiltTest hardware mapping files. Fix up old copyright years on some makefiles.

Make Doxygen fail for any Doxygen output other than unsupported tags (as these are somewhat benign).

Improve exclusion list for the main library export_tar rule to exclude any compiled library files from the export.

Removed the old pseudo-scheduler from the library as it was unused and deprecated since the 090810 release.

Add additional specific sub-family parts to the ModuleTest build test as these may have minor header file differences to their standard family cousins.

Clean up of main library Makefile to extract out the library version once into a make variable for easy reference.

Fix up Doxygen documentation directives to allow for generation of documentation when the library code root folder is not "LUFA".

Add main library makefile target "export_tar" to export a copy of the library codebase in TAR format, for each integration into user applications.

Add new Android Open Accessory class driver to the library core and add a new Android Open Accessory Host ClassDriver demo.

Added Class, ClassDevice, ClassHost and ClassCommon to the internal class driver source filenames to prevent ambiguities.

Add XMEGA to the LUFA core library makefile's list of architectures, so that the XMEGA files are properly cleaned on request.

Add new "checksource" target to the library makefiles, for automated source file existance checking.

Added new EVENT_Audio_StreamStartStopChange() event to the Audio Device Class driver to detect stream start/stop events.

Copy out the EndpointStream and PipeStream functions to each architecture, so that each architecture can optimise the stream functions according to the available hardware (such as DMA, where available).

Add new "version" makefile target to the main LUFA library makefile, to give an easy way to identify a LUFA release from the command-line.

Fixed possible invalid program execution when in host mode if corrupt descriptor lengths are supplied by the attached device.

Minor code cleanups to add const and reformat where missing, as well as abstract out the internal device signature start address into a macro, so that it can be altered to suit particular devices within a single architecture if needed.

Add missing documentation to the USB_Device_States_t enum.

Rename architecture specific driver files, to make them appear with uniquely identifying filenames in the documentation.

Initial restructuring of the core USB driver module to support multiple architectures in the future.

Add new ARCH option to the makefiles to (eventually) specify the target device architecture. Update non-usb peripheral drivers to reflect future multiple architecture support.

Removed SerialStream module, rolled functionality into the base USART Serial peripheral driver instead through the new Serial_CreateStream() and Serial_CreateBlockingStream() methods.

Renamed the Serial byte send/receive functions to remain consistent with the CDC driver's byte functions.

Altered the serial byte receive function to make it non-blocking.

New HID report item macros (with HID_RI_ prefix) to allow for easy creation and editing of HID report descriptors.

Changed over all project and demo HID report descriptors to use the new HID report item macros.

Moved the HIDParser.c source file to the LUFA/Drivers/USB/Class/Common/ directory from the LUFA/Drivers/USB/Class/Host/.

Changed over www.fourwalledcubicle.com links to the new www.lufa-lib.org redirect domain, including the new aliased links for LUFA-related pages such as the various download/source control mirrors and support lists.