add pijul

README.md

@@ -86,6 +86,7 @@ See also [Friends of Rust](https://www.rust-lang.org/friends.html) (organization
 * [notty](https://github.com/withoutboats/notty) — A new kind of terminal
 * [Parity](https://github.com/paritytech/parity) — Fast, light, and robust Ethereum implementation [![build status](https://gitlab.ethcore.io/parity/parity/badges/master/build.svg)](https://gitlab.ethcore.io/parity/parity/commits/master)
 * [parity-bitcoin](https://github.com/paritytech/parity-bitcoin) — The Parity Bitcoin client [<img src="https://api.travis-ci.org/paritytech/parity-bitcoin.svg?branch=master">](https://travis-ci.com/paritytech/parity-bitcoin)
+* [Pijul](https://pijul.org) — a patch-based distributed version control system
 * [qmx/limonite](https://github.com/qmx/limonite) — static blog/website generator [<img src="https://api.travis-ci.org/qmx/limonite.svg?branch=master">](https://travis-ci.org/qmx/limonite)
 * [Sandstorm Collections App](https://github.com/sandstorm-io/collections-app)
 * [Servo](https://github.com/servo/servo) — a prototype web browser engine