Update the unix Makefiles and the older OSX hints files to handle the
pile marker tile overlay. I didn't touch hints/macosx10.10 and .11
since I think there's still a merge for them pending.
A couple of formatting tweaks for bemain.c are included, for no
compelling reason. What are the odds that anyone will every build
that again?
Add a couple of missing .gitignore entries for files put into
place when building. include/tile.h is genearated for tiles
and dat/NetHack.ad is copied for X11 resource definitions.
