Add new page to the documentation listing existing LUFA powered projects, fix up some inaccuracies in the documentation.

Fixed CDC demo not sending an empty packet after each transfer to prevent the host from buffering incomming data.

Altered Project and Bootloader makefiles so that the path to the LUFA library can be set in one place.

Combined Keyboad and Mouse normal and interrupt driven host demos into unified Keyboard and Mouse host demos.

Corrections to Keyboard demo.

Removed AVRISP_Programmer project due to code quality concerns.

Corrected CDC class bootloader to fix a few bugs, changed address counter to store x2 addresses for convenience.