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 standard.h to take care of bcopy() incompatibilities
improved portability for read(), write() and bcopy()
added temp variables for speed
Fixed SCCSid
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