codage CFL sans nvl var

src/language/modules/SchemeModule.cpp

src/scheme/CMakeLists.txt

src/scheme/ImplicitAcoustic02Solver.cpp

src/scheme/ImplicitAcoustic02SolverModified.cpp

src/scheme/ImplicitAcousticO2Solver.cpp

src/scheme/ImplicitAcousticO2Solver2stepsModified.cpp

src/scheme/ImplicitAcousticO2Solver2stepsModified.hpp

src/scheme/ImplicitAcousticO2SolverModified..hpp

src/scheme/ImplicitAcousticO2SolverModified.cpp

src/scheme/ImplicitAcousticO2SolverModified.hpp