changed interface of block_matching.compute_disparity_map, to pass disp_min and
disp_max values as arguments (instead of writing them to a file)
add source for sift matching binary (from IPOL preprint
http://www.ipol.im/pub/pre/82/) to the 3rdparty directory
added instructions to compile the matching binary (from IPOL sift)
add a python function to query the ROI coordinates interactively using the
preview images
modified the shell script used to create links to the images in order to create
also links to the preview image files
Merge branch 'master' of https://github.com/carlodef/s2p