Fixed comments
Extensive changes to enable rtrace -oTW option for tracking ray contributions
Fixed bug in CSF calculation -- changed from sum to maximum
Continued ANSIfication.
Added grouping parens to reduce ambiguity warnings.
Compile fixes noticed on Compaq
Replaced most outdated BSD function calls with their posix equivalents, and cleaned up a few other platform dependencies.
Replaced inline copyright notice with #include "copyright.h"
Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
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