- Switched back to C++17 due to various problems on Eigen and Mac OS X.
- Use system GMSH if installed and only after look at the hardcoded path (a55af8ab).
- Improved export to SILO. E, H, and J fields are now exportable as nodal or zonal variables. It is also possible to disable the export of a specific field, see `lua_api.md` (8a831181).
- Preliminary implementation of leapfrog integration on CPU.
