Added new "Common" section to the class drivers, to hold all mode-independant definitions for clarity.

Moved SCSI command/sense constants into the Mass Storage Class driver, instead of the user-code.

Added MS_Host_TestUnitReady() and MS_Host_ReadDeviceCapacity() to the host mode Mass Storage Class driver.

Add SCSICodes.h to the Class Driver Common folder, and automatically include it in both the Host and Device Mass Storage Class drivers. Delete existing version from the ClassDriver MassStorage device demo's /Lib/ folder.

Oops: Really disable building of Projects/Host/ClassDriver directory in the Projects/Host/ makefile.

Add more skeleton functions and definitions to the Mass Storage Host mode Class driver.

Made Endpoint_Write_DWord_* functions echo the structure of the matching Endpoint routines for clarity.

Added  ATTR_NON_NULL_PTR_ARG() attributes to the class drivers to improve user code reliability by disallowing explicit NULL pointers as pointer parameters in function calls where the parameter must not be NULL.

Disabled building of the Demos/Host/ClassDriver directory until Host Mode Class drivers are complete to prevent build errors in the meantime.

Minor updates to the unfinished SideShow demo for clarity.

Added unfinished MassStorageHost class driver demo.

Enhanced class drivers to use the same public/private section seperations as other portions of the library.

Split out common defines/types from class drivers into a seperate common class driver directory.

Make central USB Class driver dispatch headers, used for both device and host modes.

Move new Class Driver powered demos to a new ClassDriver subdirectory, re-add old low level demos to a LowLevel subdirectory.

Moved out each demos' functionality library files (e.g. Ring Buffer library) to /Lib directories for a better directory structure.

Renamed Serial_Stream driver to SerialStream to remain consistent with the rest of the library's naming scheme for files.

Seperated out OTG, Device and Host mode demos into seperate folders for clarity. Adjusted makefiles so that the path to the LUFA library can be set in one place.