Bump version of Dwarf Fortress to 40_09. Build graphics library for dwar...

...f fortress instead of using provided one for more reliability.

Changed df2014 expression to build libgraphics.so from https://github.com/svenstaro/dwarf_fortress_unfuck. This will hopefully prevent df from crashing on launch (see https://github.com/NixOS/nixpkgs/issues/710 and https://github.com/NixOS/nixpkgs/pull/3357). Also made copying the df data directory to the user's home a default since df 40 does not seem to run without it (see https://github.com/NixOS/nixpkgs/pull/3357).