reorganized Panel need a abstract panel base class to make polymorph possible.
Call by ref would be nice?
Changed checkType in expressions
rendering update
After major refactoring a version that does something.
Need IF expression to get working.

Second refactor wil be the to create consistent names throughout the project.
Big refactor fase 2
Type refactor and form cleanup
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Panel code om UI packages
introduced swing helper
Updated todo list
Merge branch 'kemi' of github.com:software-engineering-amsterdam/sea-of-ql into kemi
Refactoring
Added filename checks
Merge branch 'kemi' of github.com:software-engineering-amsterdam/sea-of-ql into kemi
Fixed a bug: JavaScript returns -1 from (+(-1)), so another solution had to be implemented.
Refactoring pt 2.
Added error reporting to antlr.
Extracted a method to create the parser.
Added check for question definitions in QL from QLS
Merged conflicts