Renamed all elements still referring to zdoom.
removed the frontend specific resource data.
fixed startup dialog to accept ANSI date despite building as Unicode. This needed a bit of hackery because the macros in windowsx.h are not character set sensitive.
Currently none of these is being used, but eventually they will, once more code gets ported over.
So it's better to have them right away and avoid editing the project file too much, only to revert that later.
