meteoio

Added the MeanAvgFilter and updated the MedianAvgFilter. Now the position of the filter window can be defined. The keyword soft has the meaning that the configuration of the window position is not strict (it will adapt if there is not enough data available for the user defined window position). If both soft and the position for the window (left, right, center) are missing "center" is assumed. Usage:

TA::filter1 = mean_avg
TA::arg1   = soft right 10 100
RH::filter1 = median_avg
RH::arg1  = 10 200

Meaning: use mean_avg filter on TA, the window shall be right leaning spanning at least 10 points and 100 minutes. Use median_avg filter on RH, the window shall be centered (strictly).