Replaced instances of "/usr/tmp" with "/tmp" in scripts & documentation
Removed redundant -r option to oconv
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 -b option to work for both rad and glrad
changed to use rad and glrad for rendering
added error check for oconv
added ability to get RVIEW command from environment
fixed quoting of arguments
modified objview to take scene files of any dimension as arguments
changed revision number for 2.0 release
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