Continued ANSIfication, and other fixes and clarifications.
Fixed typing/prototype of getheader() and its callback.
Fixed call to getheader() with wrong number of arguments.
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
changed getheader() to listen to return value of passed function
added math.h for atof() usage
eliminated atof declarations for NeXT
updated revision number for release 2.0
added calls to get/put picture resolution (bug fix)
Initial revision
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