running overall assessment stage8 30 years summary for region 4, South America

testing code with new flag value and masking file

fixing problem with masking and no data values

more debugging of mask and testing of code

fixing mask used and no data values

adding compression and debugging for valid range and rescaling of mosaicing

valid value range with gdal calc in mosaic function

adding valid range parameter for mosaicing function script

listing of files using glob and minor clean up to mosaicing function script

adding use int and scaling option to function mosicing script