#include <math.h> inserted into Command.cc, one function uses 'sqrtf'.
buildscripts added to make avr-gcc and libs for ubuntu. (works on 32bit and 64bit ubuntu)
copied from MBI and modified for ubuntu
build-avr-gcc-cygwin.sh does not work
stackcheck renamed _end to __bss_end to be save in future
fixed avrfix for future use.
_Accum might get in coflict with avr-gcc or some DSP
changed lineend back to windows
Merge pull request #113 from GottfriedSp/master

fixed avrfix