USBSerial Changes

Fixed a bug where the AT90USB would not enumerate after uploading firmware. Did this by disabling interrupts in the begin function by adding cli(); and changed the GlobalInterruptEnable(); to sei();

…irmware upload

* Fixing problems where _doTasks was not called often enough to handle USB tasks properly

Conflicts:
	hardware/DynamicPerception/avr/cores/AT90USB/USBSerialClass.cpp

Modified the bootloaders for the 1287 to fit in 4KB of space. Down from
8KB. Changed the hfuse bits in the boards.txt to use 4K bootloaders
instead of 8K.

…gh USE_USB_SERIAL was not defined

Structure change to the bootloaders.

All bootloaders now reference and use the version of LUFA that is in the
core directory. Removed individual directories for boards. You now
compile different versions of the bootloader by calling "make
<insertboardname>". This allows different button and LED layouts to be
changed without having to edit the source files.

Adding boards to the bootloader is easier now. Just open BootloaderCDC.h
and add a #elif defined for your board and then a make definition in the
makefile.

Reduced the size of the bootloader directory from 46MB to 276KB.

Changed the structure of the bootloaders to make more sense. There are
now default bootloaders. Added AT90usb64X support to bootloaders

Bootloader Structure Change and AT90usb64X

…rial.h so that libraries using HardwareSerial will have TXC0 defined even if the make chooses to make the cpp file at a later point in compilation

* Moving some necessary defines from HardwareSerial.cpp to HardwareSeria...