Updated Github Release

[solvingj]

It looks like the last release on Github was a in 2015. It almost makes the library seem dead, except there are still more commits. Also, my team wants to create a package for this library for the Conan package manager. We'd rather pin to a more recent release if possible.

[dcreager]

Not dead, though it is now a spare-time effort for me instead of being something I maintain as part of the day job. That said I agree with you — it's been far too long since a release, and I think the API has stabilized enough to tag a 1.0.0. I'll try to get to that in the next few days!

[rogers0]

@dcreager time to release 1.0.0? thanks for the support!