size of PLYMAX should be determined by NPLMIX in REGDIMS not MISCIBLE.
Let parser recongnize keyword WPOLYMER.
Merge pull request #318 from qilicun/fix_ply_kw

size of PLYMAX should be determined by NPLMIX in REGDIMS not MISCIBLE.
Merge pull request #319 from qilicun/add_wpolymer

Let parser recongnize keyword WPOLYMER.