fix for error in previous hotfix (sorry in a hurry)

fix for script being unresponsive with an arduino that doesn't open s…

…erial

check avrVersionOld for not being None

Fix for not waiting long enough after EEPROM reset

fix import of psutil (confused with shutil)

Fixed wrong arduino program tools path defaults (avrsize, avrdude). N…

…ow the defaults should work on the pi. They can be overrided in the config file for other platforms

First official release with version number!

Lots of bug fixed in master and better 3-stage filtering.
Too many changes to list here!