Quote mode value when setting controller mode
Quote mode value when setting controller mode

This was sending an unquoted string, which isn't valid JSON.  Replacing
the character based JSON parser with AurdinoJSON makes this not work any
longer.  This appears to be backwards compatable with older controler
firmware because it eats the quotes.

thorrak/fermentrack,thorrak/fermentrack,thorrak/fermentrack,thorrak/fermentrack,thorrak/fermentrack