Fixed logging of old pid error

PID old error was not set to the previous value but was always zero.

Updated to add support for lights in a fermenter unit and a Power Supply status.

Better tab switching with a cookie

Added cookies to remember tabs

Added PING/PONG command to the server. Bumped to version 0.2.7

Use confirm instead of enter key when stepping to a new beer or fridge temperature

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mercurial