refactored Type grammar rule in order to be more clean
removed parameterizeded annotation from unit tests, call them throught constructor
removed ExpressionType interface, putted isOfType method in Expr abstract class
deleted InputReaders, used ANTLRs lib methods to input QLCode, fixed bug for break line symbol
changed Question/ComputedQuestion constructor inputs to objects only to promote encapsulation
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql