Merge branch 'develop' into feature/unit-tests

src/algebra/CRSMatrix.hpp

src/algebra/CRSMatrixDescriptor.hpp

src/algebra/EigenvalueSolver.cpp

src/algebra/EigenvalueSolver.hpp

src/algebra/LinearSolver.cpp

src/algebra/LinearSolver.hpp

src/algebra/LinearSolverOptions.hpp

src/algebra/PETScUtils.cpp

src/algebra/PETScUtils.hpp

src/algebra/SmallMatrix.hpp

src/algebra/SmallVector.hpp

src/algebra/TinyMatrix.hpp

src/language/PEGGrammar.hpp

src/language/ast/ASTBuilder.cpp

src/language/ast/ASTNodeBinaryOperatorExpressionBuilder.cpp

src/language/ast/ASTNodeDataTypeBuilder.cpp

src/language/ast/ASTNodeExpressionBuilder.cpp

src/language/modules/BuiltinModule.cpp

src/language/modules/BuiltinModule.hpp

src/language/modules/CoreModule.cpp