Added Gerber- and Eagle-Files for DIY-Maiskolben, Lasercut-Files for
Maiskolben TFT (DIY Case is in progress) and upgraded Software to 2.4:
Changed display of DC input to power cord, which will change from red
(< 12V) to green (> 14.5V) to symbolize a good power supply and
circumvent the wrong displayed voltage by voltage-divider with a
maximum measurable VIN of 14.79 V. Therefore added a power cord icon.
Removed debugging output.
