- Introduce present Changelog file. - Update Petsc to v3.10.1 - Update Boost to 1.68. - Remove SuperLU_dist and Mumps: use versions embedded in Petsc, as Petsc devs recommends. - Remove Yuni. - Improve multi-platform support for Petsc. - Update Lua to 5.3.5. - Update Openmpi to v3.1.2. - Add a macro definition in Lua compilation to hopefully get rid of a warning that happens at link time about unsafe command. - Improve Dockerfile.