#4 If the shapefile or GeoTIFF cannot be open, print a Error on page.
4 python code that tries to open shapefile and GeoTIFF to make sure
they can be open, otherwise post and warning to data_information page.
Merge pull request #5 from MBoustani/#4_check_for_opening_shp_and_tif_file

#4 If the shapefile or GeoTIFF cannot be open, print a Error on page.