chore: Added extern "C" to headers to avoid C++ name mangling
feat(mkpmap): Extended -apo option to reorient photon ports.
Added -ae/-ai ambient exclude options to mkpmap, cleaned up opt parsing.
Initial import of ooC photon map
Removed redundant $Id: in file
Added missing RCSid forgotten during initial check-in
Double-counting bugfix for glow sources (thanks DGM!), revised copyright
Initial check-in of photon map addition by Roland Schregle
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