USBaspLoader v0.97 stable release

USBaspLoader v0.97 stable release

  -  support for ATmega8535
  -  support for ATmega162
  -  support for minimal necessary GPIO
  -  CRC32 support for updates

  -  improved autoconfiguration
  -  improved making process (dependency tracking)
  -  optimized flash usage
  -  compiles on larger variety of avr-gcc versions

  -  many more new features
  -  many more bugfixes

  -  more tested devices

Because users ofter were confused by the provided hexfiles and
the firmware from tinyUSBboard, precompiled hexfiles are not
further supported.
Please use binaries provided for tinyUSBboard instead:

         http://matrixstorm.com/avr/tinyusbboard/

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