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
updated revision number for release 2.0
added FLOAT definition to better control size of structures
change sphere with negative radii into bubbles
Defined return values for intersection functions. Changed order of call to addobject to rotate O_IN objects.
Initial revision
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