Added css classes to provide a 'heat-map' effect to the calendar view. F...

...or

each calendar generated, the widget will traverse the data set to calculate
    the max and min number of accummulated match counts on a single day. It
    will then generate a css label for every day, based off the day's match
    count relative to the max min range, on a 0-10 scale.


    For example, if the min.max range is [0,12] ... and a day's count is
    6, then the generated css will be "intensity-level-5".