[Doxygen] Fix some incorrect/missing "@file" commands

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2352 02a645c2-efd0-11dd-984d-ab748d24aa7e
Deprecate class Elements

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2353 02a645c2-efd0-11dd-984d-ab748d24aa7e
Deprecate Kinetics::activationEnergies

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2354 02a645c2-efd0-11dd-984d-ab748d24aa7e
Deprecate unused spectroscopy-related classes

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2355 02a645c2-efd0-11dd-984d-ab748d24aa7e
Deprecate ctml::getFloats

git-svn-id: https://cantera.googlecode.com/svn/cantera/trunk@2356 02a645c2-efd0-11dd-984d-ab748d24aa7e