Many Code Changes

Added abillity for plugins to report multiple values.  Set thingspeak to
comply with the 15 seconds between sending updates which is specified in
the API docs.  Added new features to the relay plugin to allow for
timers, ranges, and pulses.  Added telnet server for calibration of ec
and ph sensors.  added arduino bridge for dht11 sensor and co2 sensor.
fixed many issues with the web interface java.  Fixed various other bugs
and added more error handling..