Bug fix!!!
Loaded a TroeFalloff object instead of Lindemann, produced an
invisible nan...
Fixed a bug in drate_dT expression, simplified a little bit
drate_dX expression, and doxygen docs update starts
Updates on doxygen kinetics documentation
keeping up-to-date and mergeable
Merge branch 'master' of https://github.com/libantioch/antioch into irreversible

Conflicts:
	test/lindemann_falloff_unit.C