Added program create_base_images that chops a swath into framed images.
Added subroutines to get a lat from a frame and a line for a frame.
Renamed files, created downsized QC image and full res subsample QC image.
Added switches to roi2img and create_roi_in to deal with ESA frames (-E).
Reworked the ESA frames...  Using a search for nearest node that still allows 15% overlap.