Add terminal colors. Fix some PEP8 formatting issues
Add Git style file hash + test for it
Add Git style file hash + test for it
Derive file hashes from {inode, device_id} pair. Drop Git style hashing. Revise the directory scanning regex and its mechanism in general.
Add argument parser. Add an option to add description to multiple files at a time (e.g. via *.glob). See if file "expire" by looking at their ctime: if so, don't show their descriptions unless an option provided.