[release] mdapi: 2.2.3

[Pierre-Yves Chibon]

Good morning,

Another day, another release.
I just cut and pushed a new release of mdapi: 2.2.3
It's a simple bugfix release, making official a hotfix I made yesterday that
fixed displaying the /branches endpoint.

Here is the changelog:
* Tue Nov 24 2015 Pierre-Yves Chibon <pingou(a)pingoured.fr&gt; - 2.2.3-1
- Update to 2.2.3
- Fix the branches endpoint (un-instantiated variable)


Happy querying!
Pierre