Refactoring test class
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Packages updates and qacc.ql started.
Renamed BinaryTree to Binary
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Made the visitor type independent
added typeOf methods for expressions
Added compatibility of types
typeEnvironment gets filled, added typecheck for Add
added method bodies for visiting statements
Implemented type checking for expressions
Updated readme
Made fields in ASTNodes final
Started Grammer
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
gitignore fix
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql