Git on Urbit PRs

[mikolajpp]

This is an issue to track the progress of various PRs to both urbit and vere repos neccessary for the "Git on Urbit" project.
The hoon-git infrastructure is able to function with very minimal jetting. In fact, there are no hoon-git specific jets in the whole codebase. Rather, we require jets for the bytestream library and DEFLATE decompression library /lib/zlib.hoon by @nathanlever. These libraries are of general use and nothing specific to hoon-git. The list of PRs follows.

1. +sew jet: ++sew jet vere#698
2. bytestream jets: Bytestream jets vere#710
3. +checksum in zuse.hoon: +checksum in zuse.hoon #7058
4. checksum jets in Vere: +checksum jets for zuse.hoon vere#709
5. zlib jets in Vere: Jet zlib decompression library vere#711
6. Fix pURL parsing: zuse: fix parsing of empty segment in +deft:de-purl:html #7048

@belisarius222 @sigilante @joemfb @pkova

[mikolajpp]

Closing as all PRs mentioned above have been merged. Many thanks to everyone involved!

[sigilante]

Congratulations!