Gavrog 0.6.0 beta 2 has been released

Hello again!

This is just a quick announcement of the release of a second beta test version for Gavrog version 0.6.0, which includes 3dt 0.6.0 and Systre 1.2.0. The new release fixes a small number of bugs, mostly related to saving data to files. You can look at the detailed list or download the new release at https://github.com/odf/gavrog/releases.