SOA.
set_conserved_moments
add conserved moments information to have a direct access.
consm : dict
set the name and the location of the conserved moments. The format is key : the conserved moment (sympy symbol or string) value : list of 2 integers first item : the scheme number second item : the index of the conserved moment in this scheme
set the name and the location of the conserved moments. The format is key : the conserved moment (sympy symbol or string) value : list of 2 integers
first item : the scheme number second item : the index of the conserved moment in this scheme
nv_ptr : list of int
store the location of the schemes
