for pyraf ticket #87; moved the bulk of the file here from pyraf - left in pyraf only the PsetEparOption class
for pyraf ticket #87; moved the bulk of the file here from pyraf - left in pyraf only the PsetEparOption class

git-svn-id: e4aa3cfa51ba591d1cd1dbbaf7e4a2c2b5d7a7ff@7312 fe389314-cf27-0410-b35b-8c050e845b92

spacetelescope/stsci.tools