Fixed lack of support for the ATMEGA32U2 in the DFU and CDC class bootloaders

Changed incomplete Webserver project over to using the uIP timer library.

Fixed incorrect interface values in the VirtualSerialMouse and KeyboardMouse demo class driver structures.

Added caveat information to the CDC device class driver.

Added support to the MIDI Class drivers for packed data, where multiple MIDI events are packed into a single USB packet. Added new MIDI Class driver flush routines to override packing behaviour.

Inline USB management functions in the Class drivers which are standardized but currently unused, to prevent them from using up unneccesary cycles and flash in the user application.

Fix MassStorageKeyboard demo USE_INTERNAL_SERIAL check being performed before the required library headers were included, causing a compilation error.

Added notes to the class driver functions indicating which functions require what Device/Host state machine states to function.

Add new TemperatureDataLogger project, a simple USB Mass Storage class Temperature Data Logger using the onboard Dataflash and Temperature sensor.

Reduced guard bit time in the AVRISP project PDI/TPI protocols to reduce the time needed to reverse the data communication direction.

Fixed AVRISP PDI race condition where the guard time between direction changes could be interpreted as a start bit. Fixed TPI interface lines not being changed correctly when in bit-banged TPI mode.

Change the AVRISP project's RESET LINE makefile tokens to AUX LINE, as it is not always used for target reset.

Fix TPI NVM Write handler -- AVRStudio sends out writes in page sized chunks, not byte sized chunks.

Add first draft of the TPI NVM commands for reading, writing and erasing a target. Needs testing when physical access to a part is available.

Add dummy undocumented TPI XPROG parameters to the AVRISP project so that TPI programming mode can be entered.

Fix mistakes in the XPROGTarget.c/.h files for TPI mode software USART clock rate and PDI mode XPLAIN board autoconfiguration.

Remove missed timer 0 init code in the ISP protocol handler in the AVRISP project. Switch the XPROG protocol target communications handler over to using Timer 1 COMA/COMB ISRs for the two physical layers, rather than COMA/ICR1. Speed up bit-banged USART mode slightly.

Added command timeout to the AVRISP project so that incorrectly connected targets no longer freeze the device.

Removed string descriptors from the TeensyHID bootloader to reduce its size.

Complete combining of PDI and TPI target communication code files, stub out TINY NVM controller functions.

Rename PDITarget.c/.h to XPROGTarget.c/.h so that both PDI and TPI programming can be included in the one set of files.

Combine AVRISP project TPI and PDI lib directories - these protocols use the same underlying XPROG wrapper for the host-to-programmer command wrapping.