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 nested10;

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

void main()
{
    int j = 3;
    void F()
    {
        int i = j;
        printf("F: i = %d, j = %d\n", i, j);
        void G()
        {
            printf("G: i = %d, j = %d\n", i, j);
            j += i;
        }
        G();
    }
    F();
    printf("6 = %d\n", j);
    assert(j == 6);
}