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 classes5;
extern(C) int printf(char*, ...);

struct S
{
    long l;
}

class C
{
    C c;
    S s;
}

void main()
{
    C c = new C;
    long* lp = void;
    {c.s.l = 64;}
    {assert(c.s.l == 64);}
    {lp = &c.s.l;}
    {assert(*lp == 64);}
    printf("classes5 success\n");
}