Replace incorrect version of TOV sequence for G. Shen FSU 2.1 EOS

Previously I had thought GShenFSU21 and HShen were basically identical
EOSs. It turns out I had mistakenly run MakeTOVSequence on HShen twice.
The EOSs were not at fault, but my construction of a TOV sequence was.
I've replaced the files
maketovsequence-GShenFSU21_ColdTable.??t with
maketovsequence-GShenFSU21_ColdTable-warm-smooth.??t, because, in fact
I am using the T!=Tmin and smoothed-in-rho version of the EOS. I've
also updated the gnuplot scripts to handle the new sequence.