Fix VarDecls for tuples. Closes #99. I've implemented it this way since it doesn't require any changes in the frontend. However, I think having TypeTuple expressed as LLVM struct types would make much more sense and open the door to tuple lvalues.

struct Structure
{
    static void static_method()
    {
    }

    void method()
    {
    }
}

void main()
{
    //Structure.static_method();

    Structure s;
    s.method();
}