Merge branch 'feature/language-discretization' into 'develop'

CMakeLists.txt

src/CMakeLists.txt

src/language/algorithms/AcousticSolverAlgorithm.cpp

src/language/modules/CMakeLists.txt

src/language/modules/ModuleRepository.cpp

src/language/modules/SchemeModule.cpp

src/language/modules/SchemeModule.hpp

src/language/modules/UtilsModule.cpp

src/language/modules/VTKModule.cpp

src/language/modules/VTKModule.hpp

src/language/modules/WriterModule.cpp

src/language/modules/WriterModule.hpp

src/language/utils/CMakeLists.txt

src/language/utils/FunctionSymbolId.cpp

src/language/utils/FunctionSymbolId.hpp

src/language/utils/PugsFunctionAdapter.hpp

src/output/CMakeLists.txt

src/output/GnuplotWriter.cpp

src/output/GnuplotWriter.hpp

src/output/IWriter.hpp