Merge branch 'issue/21' into 'develop'

src/language/PugsParser.cpp

src/language/ast/ASTNode.hpp

src/language/ast/ASTNodeAffectationExpressionBuilder.cpp

src/language/ast/ASTNodeBuiltinFunctionExpressionBuilder.cpp

src/language/ast/ASTNodeDataType.cpp

src/language/ast/ASTNodeDataType.hpp

src/language/ast/ASTNodeDataTypeBuilder.cpp

src/language/ast/ASTNodeDataTypeBuilder.hpp

src/language/ast/ASTNodeDataTypeFlattener.cpp

src/language/ast/ASTNodeFunctionExpressionBuilder.cpp

src/language/ast/ASTNodeListAffectationExpressionBuilder.cpp

src/language/ast/ASTNodeNaturalConversionChecker.cpp

src/language/ast/ASTNodeNaturalConversionChecker.hpp

src/language/ast/ASTSymbolInitializationChecker.cpp

src/language/modules/MeshModule.hpp

src/language/modules/ModuleRepository.cpp

src/language/modules/SchemeModule.hpp

...anguage/node_processor/ASTNodeExpressionListProcessor.hpp

src/language/node_processor/AffectationProcessor.hpp

src/language/utils/ASTNodeDataTypeTraits.hpp