Changed the handling of variadic intrinsics a bit. Removed the -fp80 option and made real be 80bit floats on X86, this is what the D spec really says it should be and fixes a bunch of issues. Changed the handling of parameter attributes to a bit more generalized approach. Added sext/zext attributes for byte/short/ubyte/ushort parameters, fixes #60 . Parameter attribs now properly set for intrinsic calls if necessary. Made the tango.math.Math patch less intrusive. Fixed/added some mini tests.

module nested11;

extern(C) int printf(char*, ...);

void main()
{
    int i;

    void f()
    {
        i++;

        void g()
        {
            i++;

            void h()
            {
                printf("i = %d\n", i);
            }

            h();
        }

        g();
    }

    f();
    assert(i == 2);

    void foo()
    {
        i = 42;
    }

    void bar()
    {
        foo();
    }

    bar();
    printf("i = %d\n", i);
    assert(i == 42);
}