testing function combine extraction and assessment data, also moved to function script

removing code related to time series and combine extracted and stations information from assessment

moving more functions, quick small test for extraction function, listing date produced and missing for mosaics

more clean up and moving functions from product assessment part 1 to functions script

major changes adding function to extract from raster, combine extracted data with assessmment and cleaning up

adding function to match specific set of station location from assembled stations of training and testing

gathering stations data for building time series, clean up of script for product assessment part1

product assessment part1 testing plot function for training residuals at at stations and fixing bugs, region 1

moving plot_stations_val_by_date to function script product assessment part1

testing plot for both training and testing and introducing a new function