Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h
Reduced compile warnings/errors on Windows.
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
added setfdate function
compatibility fix
changed non-existent file return from -1 to 0
Initial revision
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