Merge branch 'develop'
added config options group to doxygen
more doxygen comments added
In adjoint subsonic outlet bc: direct soln values using Reimann and c instead of c^2
added config options group to doxygen
more doxygen comments added
In adjoint subsonic outlet bc: direct soln values using Reimann and c instead of c^2
Merge branch 'develop' of https://github.com/hlkline/SU2 into develop
 addtl correction to psi_outlet[0] and addition of mass_flow_rate objective term to psi_outlet[0]
fixed typo
Updated incompressible adjoint
Updated sym bc (adjoint)
Small update
Update to incompressible adjoint symmetry BC.
Bug fixing
added config options group to doxygen
more doxygen comments added
In adjoint subsonic outlet bc: direct soln values using Reimann and c instead of c^2
added config options group to doxygen
more doxygen comments added