Development has now moved to github:
The move to github brings a few advantages, including Travis-CI integration:
(btw - does anyone know of a CI solution for FreeBSD?)
Here's the funky download page (just click your distro):
procenv runs a lot of tests at build-time, you should be reasonably safe.
If you'd rather opt for official releases, the new version should be in Debian and Ubuntu Xenial soon. It should also arrive in Clear Linux tomorrow.
As for what has changed since the last blog-post, just take a look at the NEWS file: