Added planisphere view type (-vts option) as requested by Axel Jacobs
Added -pd option for depth-of-field sampling and -vd focal distance entry
Continued ANSIfication.
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 output for rcalc -e option
slight efficiency improvement and better error checking
Initial revision
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