updated gitignore
fix changed interface
changed output image initialisation from 0 to NAN in the crop binary
use the pointing correction matrix in the triangulation step. Modified
interfaces of triangulation.compute_height and transfer_height
functions.
modified function filtered_sift_matches_full_img to manage big ROIs
instead of full image. Added a function to run the pointing error
correction on a specified ROI, of any size.
refactored tile_composer
added global pointing correction matrix as a parameter of the
main_script.process_pair function