[Diff since v0.5.13](https://github.com/JuliaMolSim/DFTK.jl/compare/v0.5.13...v0.5.14) **Merged pull requests:** - Ewald with ForwardDiff and merge (#774) (@epolack) - add a keyword argument to plot_dos to support user-defined unit (#776) (@kunyuan) - Warn for slated pymatgen removal (#778) (@mfherbst)