Make build process easier to retarget to new Atmel release#43

Merged

facchinm merged 2 commits intoarduino:masterfrom

sleemanj:master

Dec 2, 2016

Commits on Dec 2, 2016

Make build process easier to retarget to new Atmel release, auto detect version numbers and so forth.
sleemanj
committed
Install gdb only instead of also pulling in it's (old) binutils over the top of the one we already compiled.
sleemanj
committed