prepReader.py: Fix a typo
prepReader.py: Write explicit pair parameters with correct scaling

Extract SCEE and SCNB from comments of dihedrals.
glycam2gromacs.py: Put SCEE and SCNB in comments
Glycam_06g-1.dat: Expand tabs and remove trailing spaces
dat: Regenerate glycam06g.itp, changes only in comments and whitespace