Compressible solver updated with Primitive Variables
Small change in subroutine names.
Updated viscous structure
Updated LS gradient computation using master
Small ajustments
Updated incompressible solver with primitive variables.
Merge branch 'master' of https://github.com/su2code/SU2 into feature_UpwindPrimVar
Updated turbulence model, including 2nd order (check JST)
Updated JST (primitive and conservative variables)
Updated incompressible centered schemes.
Updated structure (general framework for density and pressure computation incompressible/compressible)
Now viscosity and eddy viscosity are primitive variables of the NS solver.
Working version with viscosity in the set of primitive variables.
Merge branch 'master' of https://github.com/su2code/SU2 into feature_UpwindPrimVar
Updated FreeSurface solver... not working (but the structure is OK).