Merge pull request #14 from DougEdey/master

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Merge pull request #15 from DougEdey/master

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Merge pull request #16 from DougEdey/master

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Merge pull request #17 from DougEdey/master

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Merge pull request #18 from DougEdey/master

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Merge pull request #19 from DougEdey/master

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Updated so that statistics are sparsely populated instead of having a point on every change.  Added tolerance for noise on sensor.
Merge pull request #20 from DougEdey/master

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Added threshold for logging changes in temperature.  This limits the number of points logged because the sensor tends to fluctuate between two temperatures.
Merge pull request #21 from cmpterman2/master

Reduced number of points logged during statistics - added threshold and individually log changes in a series.