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.

class A {
    int i;
    int l;
    this(bool b,bool b2=false) {
        if (b) this = new B;
        i = 4;
        if (b2) this = new C;
        l = 64;
    }
}
class B : A{
    this() {
        super(false);
    }
}
class C : A{
    this() {
        super(false);
    }
}
void main() {
}