Removed redundant $Id: in file
Added missing RCSid forgotten during initial check-in
-am option to rpict/rvu/rtrace now sets fixed max photon search radius, -overriding the adaptive max search radius
Removed extraneous default for photon map
Set ambient bounces to 1 if set to 0 when photon map specified
Double-counting bugfix for glow sources (thanks DGM!), revised copyright
Initial check-in of photon map addition by Roland Schregle
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