I have released v0.7.0 with zlib support.
I have implemented the instructions detailed above. For the old format, the instructions are called find_zlib, find_zlib_hash, and replace_zlib.
Please port your old-style zlib patches over and test them. You can post converted patches here. Once they are stable, please post them in
this thread.
Also, you can use my new tool, cssextract, to extract the css from nickel with the information needed (offsets, hashes, css, etc) to make the patches for kobopatch.
If you have any questions, feel free to ask. Also, if you have any suggestions for new zlib instructions, I'd love to know.