USBaspLoader v0.96 release

USBaspLoader v0.96 release

 - full tested support of ATmega2560
 - improved layout for testboard (Rev.3)

 - improved build process
 - fixed issue 6 to really disable watchdog timer
 - additional support for ATmega640, ATmega1280, ATmega1281, ATmega2560 and ATmega2561
 - additional support for ATmega16
 - additional safety checkings
 - new feature: "BOOTUP_CLEARRAM"
 - new usbdrv recent release 20121206

Precompiled bootloader v0.96 for atmega8 (Rev.3),
default (Rev.3) schematics clocked with 16 MHz
(not all AVRs are tested, yet! But please report!)

sha1sums are:

	bd3dd35e8ca43eae88e7e73d4e846fed62c5b5c1        "raw bytecode usbasp"
	4f236bf72f6e9ce5737c2b16c0eb7169234c6b20        "raw bytecode update"

	cd0184257ffd0d8be400fdeafe398ee1e4290304        "elf firmware usbasp"
	c72d1742f1ec785c6265cc8da9bc86538e224c7a        "elf firmware update"

	4ee602ad24f467a531142e4a23b2b7c12b4c291d        firmware_usbasploader.hex
	cfcbd7ab283768d21c097ac0755dc437022f487b        update_usbasploader.hex

Signed-off-by: Stephan Baerwolf <stephan.baerwolf@tu-ilmenau.de>