[ENH] 1D advection equation for testing purposes
[FIX] wavespeeds and alpha for BR2 scheme (ref issue #1)
[FIX] fixed issue #1 :  Testing of diffusion in 1D
[ENH] Diffusion in 2D ( issue #1 )
[ENH] fixed #2 : Implementation of Navier-Stokes in 1D and 2D
[ENH] missing typedef