Can now build all Arduino libs using one workfile.
Good for finding compiler warnings.
SAM support.
Moved arduino flags out of gccFlags.rb.
AVR fixes.
Added capacity to use more than one Arduino environment per run.
Functionality of build-arduino-* remains the same as in previous commit.
HexWork: Added cwd to @SOURCES.
This allows you to add .cpp and .h files to your sketch.