Added support for saving and restoring the sensor history for the last 24h. The sensor history is now saved in a reduced format (duplicate values are removed, gaps are marked with a NAN sensor value.

<?xml version="1.0" encoding="utf-8"?>

<configuration>

  <startup>

    <supportedRuntime version="v4.0" />

    <supportedRuntime version="v2.0.50727"/>

  </startup>

</configuration>