Make wrapper
I realized that almost all games need a wrapper, simply because their binary is usually not in the "bin" directory. Many games also require the current directory to be that of the binary, so this helper fixes that. Finally, it is often useful to set LD_LIBRARY_PATH to the right value, for the games that embed proprietary DLLs.
Once this gets merged, I'll replace all manual wrapper snippets with make-wrapper
.