Test fix, boilerplate removal and refactoring
fixed syntax test cases (switched expected/actual class), deleted rascal skeleton and old java project
Merge branch 'master' of github.com:software-engineering-amsterdam/sea-of-ql
Minor toString mods
formatter mod
Introduced Natural and Valuable interfaces with their respective visitors
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
minor refac
Introducing model
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql