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 vararg3;

import tango.core.Vararg;

void func(...)
{
    assert(_arguments.length == 3);
    assert(_arguments[0] is typeid(int));
    assert(_arguments[1] is typeid(float));
    assert(_arguments[2] is typeid(long));
    assert(va_arg!(int)(_argptr) == 4);
    assert(va_arg!(float)(_argptr) == 2.5f);
    assert(va_arg!(long)(_argptr) == 42L);
}

void main()
{
    func(4, 2.5f, 42L);
}