Turned FunctionCall's argument-list into array; now in line with
other lists like parameters and function-declarations. Furthermore,
semicolon-precedence now explicitly higher then assignment-precedence.
Changed package structure. Now everything is under edu.uap.tripla.
Removed leftover class. No longer needed since commit
0218fc43178c6fd454ae9efdb4c7c1578757ec60.
Added compiler. Extended abstract syntax tree classes for accessing
member variables. Added interface for parser, compiler and abstract
machine, including test cases.