Changes to plotting function for raster mosaic and other

initial commit for functions script part 2 global product assessment

adding new function to plot and generate animation for list of raster files or figures

testing animation function for RMSE mosaics

more changes and generating animation for reg6 (Australia and South East Asia)

degugging function to generate animation from mosaic figures

testing function to generate animation and moving to function script

creating function to generate animation from mosaic figures png files

more changes to generate animation from png

testing generation of animation using ImageMagick for mosaic