Create thermometer using rgraph

Comparing #7 with #10

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Hi Freifriends,

First I would like to thanks robregonm for it's very nice extension developing
[...]
/**
* RGraph Bars class
* @author Ankit Modi <amodi06@gmail.com>
* @date 24/07/2013 09:25 AM
*/
require_once('RGraphWidget.php');
class RGraphThermometer extends RGraphWidget
{
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