Abstracted process and path handling for Windows. Renamed FLOAT to RREAL because of conflict on Windows. Added conditional compiles for some signal handlers.
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
fixed 1 in 1e9 bug caused by point on boundary of cube
updated revision number for release 2.0
added FLOAT definition to better control size of structures
Initial revision
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