Initial commit
Project setup
Added the necessary classes for the project to compile.
Created batch files to compile the parsers.
Added the appropriate expressions to the AST classes.
Updated the tests.
jacc tests.
Implemented boolean and string parsing in Antlr.
Merge branch 'master' of https://github.com/software-engineering-amsterdam/sea-of-ql
Refactoring: Extract Superclass. Extracted a superclass for unary and binary expressions.
Moved IParser and ParseError to superpackage because they aren't just used by the test but by all the parsers.
Renamed interfaces to Java code convention: no leading 'I'.
Updated the version of Antlr.
Restructured unit tests.
Added a string rule so '"' will be parsed as part of the string, instead of terminating the string.
Added parser for forms and various unit tests.
Fixed tests and code so the unit tests now pass.
Separated FormElements into a single FormElement and a FormElements list.
Added the 'Computed' form element
Added parsing rules for 'else if' and 'else'