added AST generation for sizeof expression
TODO
minor
added AST generation for array subscript expression
fix
added AST generation for char constants
changed default arguments: now only syntax is checked by default and C-code en IR are genererated optionally
c-code generation: added pkgname to global symbols
minor
generating C-code for ArrayValueDecls (partial)
strip \n and ; in for-loop C-code generation
parser: colorized error prints
added AST generation for member expr and fix for nested arraysubscript expr
added AST and C-code generation for (some) UnaryOperators
added more unary operators
updated TODO