replaced type of ident.name with stringliteral
replaced external type of ident.name with stringliteral
changed constructor type of ident.name to StringLiteral
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
changed type of form.title from String to StringLiteral
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
removed "Expression" interface, moved responsibility to Expr superclass
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
restructured validation
removed acceptfinder
encapsulated returnfinder in registry
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
validation for unary operators
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
removed any usage of Class<?> and .class
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
removed ReturnFinderTypeVisitor
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
encapsulated AbstractType return values of returnfinder in registry
Added support for not equality Int value checking
Added support for not equality Bool value checking