added quotes for deviceManager json output. Used sprintf_P. Incredibly, this saves 264 bytes of program space.
added quotes for deviceManager json output.
Used sprintf_P. Incredibly, this saves 264 bytes of program space.

etk29321/firmware,glibersat/firmware,glibersat/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,BrewPi/firmware,glibersat/firmware,etk29321/firmware,etk29321/firmware,glibersat/firmware,BrewPi/firmware,BrewPi/firmware,etk29321/firmware,BrewPi/firmware,etk29321/firmware,glibersat/firmware,etk29321/firmware