added possibility for future use of radial comparisons. moved list_iframes to common.
list_iframes is more modular. phash_dir is absolute. added histogram comparison to hashcompare.
added method option to findscreen
re-added filtering of method and removed debugging message
added new script for comparisons that should be more accurate. moved findscreen to prepare for its replacement
made common.sh compatible with new script
renamed new script to findscreen, it takes the place of the old hashcompare.py+findscreen
removed method option, all methods are printed. made argparse aware of the new prog name
version bump
added ability to read version from findscreen