plsdimap: Set up transformation from metafile coordinates

Set up transformation from metafile coordinates. The size of the plot is scaled so as to preserve aspect ratio. This isn't intended to be a general-purpose facility just yet (not sure why the user would need it, for one).

dimxmin (PLINT, input) NEEDS DOCUMENTATION dimxmax (PLINT, input) NEEDS DOCUMENTATION dimymin (PLINT, input) NEEDS DOCUMENTATION dimymax (PLINT, input) NEEDS DOCUMENTATION dimxpmm (PLFLT, input) NEEDS DOCUMENTATION dimypmm (PLFLT, input) NEEDS DOCUMENTATION

Redacted form: plsdimap(dimxmin, dimxmax, dimymin, dimymax, dimxpmm, dimypmm)

This function is not used in any examples.