[svn r229] Updated the object.d implementation to the latest Tango. Fixed a bunch of the built-in typeinfos for arrays, they did not inherit TypeInfo_Array. Applied patch to tango/text/convert/Layout.d by fvbommel, closes #47 . Cleaned up some type code. Replaced uses of llvm::Type with LLType (a typedef), same for Value and Constant. Fixed a few cases where typeinfo for user structs could be emitted multiple times, seems to still be some cases of this :/

class C
{
    int c;
    long f(long l)
    {
        return l;
    }
}

class D : C
{
    int d;
    override long f(long l)
    {
        return l*2;
    }
}

void main()
{
    scope c = new C;
    assert(c.f(25L) == 25);
    scope d = new D;
    assert(d.f(25L) == 50);
    C cd = d;
    assert(cd.f(25L) == 50);
    assert(func(d,25L) == 50);
}

long func(C c, long l)
{
    return c.f(l);
}