add some documentation
start optimizing for v2.2

prevent short circuit
Merge branch 'mood39' of github.com:LeSpocky/netz39-avr_starterkit into mood39

Conflicts:
	pcb/mood39/starterkit_v2.1_place.svg
neues Board, alles bisschen auseinander
routed
did DRC
change text on board
a little space for a tiny logo
add little LED orientation hint
round corners on gnd polygon
optimize vias

removed double vias, moved some signals, did DRC again
cam job for current board revision
square pad for ISP pin 1 and add documentation
add CNC reference markers
target #9
add DMX addon board
Merge pull request #8 from LeSpocky/mood39

v2.2

Die eagle-Files habe ich mir jetzt nicht einzeln angeschaut, insgesamt sieht es plausibel aus.
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