Added ability for calc to read on a continued line
Reduced compile warnings.
Added prototypes and includes from patch by Randolph Fritz. Added more required includes and reduced other compile warnings.
Replaced most outdated BSD function calls with their posix equivalents, and cleaned up a few other platform dependencies.
Reduced compile warnings/errors on Windows.
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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