added config options group to doxygen
added config options group to doxygen

In adjoint subsonic outlet bc: direct soln values using Reimann and c instead of c^2

srange/SU2,pawhewitt/Dev,shivajimedida/SU2,Heathckliff/SU2,shivajimedida/SU2,opfeifle/SU2,bankur16/SU2,hlkline/SU2,opfeifle/SU2,cspode/SU2,Heathckliff/SU2,chenbojian/SU2,KDra/SU2,drewkett/SU2,bankur16/SU2,Heathckliff/SU2,cspode/SU2,shivajimedida/SU2,bankur16/SU2,chenbojian/SU2,pawhewitt/Dev,kulkarnimandar/SU2,bankur16/SU2,pawhewitt/Dev,hlkline/SU2,jlabroquere/SU2,kulkarnimandar/SU2,Heathckliff/SU2,chenbojian/SU2,cspode/SU2,KDra/SU2,hlkline/SU2,shivajimedida/SU2,hlkline/SU2,jlabroquere/SU2,drewkett/SU2,jlabroquere/SU2,chenbojian/SU2,opfeifle/SU2,pawhewitt/Dev,cspode/SU2,kulkarnimandar/SU2,huahbo/SU2,shivajimedida/SU2,drewkett/SU2,KDra/SU2,drewkett/SU2,opfeifle/SU2,bankur16/SU2,kulkarnimandar/SU2,jlabroquere/SU2,hlkline/SU2,pawhewitt/Dev,KDra/SU2,huahbo/SU2,srange/SU2,bankur16/SU2,KDra/SU2,shivajimedida/SU2,jlabroquere/SU2,cspode/SU2,Heathckliff/SU2,cspode/SU2,huahbo/SU2,pawhewitt/Dev,huahbo/SU2,opfeifle/SU2,chenbojian/SU2,jlabroquere/SU2,drewkett/SU2,kulkarnimandar/SU2,huahbo/SU2,Heathckliff/SU2,srange/SU2,srange/SU2,huahbo/SU2,opfeifle/SU2