aareadme in $CASE/gen/ver_12/sjaganat/docs: 	 - RJL 040216

ChgenV12.doc was copied to $CASE/gen/ver_12/doc/chgenv12.doc
There is no diff between them:
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saturn.cs.uml.edu(16)> diff ChgenV12.doc ../../doc/chgenv12.doc
saturn.cs.uml.edu(17)> pwd
/nfs/earth/misc/proj3/case/gen/ver_12/sjaganat/docs
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chgenv12r1.doc merely corrected a last-page reference.