Clarify license issue in #75, and minor changes
Clarify license issue in #75, and minor changes

fboris/firmware,ming6842/firmware,fboris/firmware,ming6842/firmware,UrsusPilot/firmware,UrsusPilot/firmware,UrsusPilot/firmware,fboris/firmware,ming6842/firmware,ming6842/firmware-new,ming6842/firmware-new,ming6842/firmware-new