Merge branch '2019.2'
Merge pull request sfepy#504 from BubuLK/refine-hanging-segfault
Merge branch '2019.1'
Merge branch '2018.4'
Merge branch '2018.3'
Merge branch '2018.2'
Merge branch '2018.1'
Merge branch 'fix-vc++-9-compilation'
Merge branch '2017.4'
Merge branch '2017.3'