Request for Condor-C first-class attribute in the submit file

This is an implementation of one idea.  The idea is to overload the
RSL attribute and add all the HTCondor-CE attributes directly to
the submit file.

For #5204 Feature.
Added documentation for adding HTCondor-CE attributes

For #5204 Feature.
Merge branch 'master' of ssh://cdcvs.fnal.gov/cvs/projects/glideinwms