rna → chemical Relation

File in src/core/fragment/rna	Includes file in src/core/chemical
FragmentLibrary.cc	rna / util.hh
FullAtomRNA_Fragments.cc	rna / RNA_FittedTorsionInfo.hh
FullAtomRNA_Fragments.cc	rna / util.hh
RNA_FragmentHomologyExclusion.cc	ChemicalManager.hh
RNA_FragmentHomologyExclusion.cc	ResidueType.hh
TorsionSet.cc	rna / util.hh