NSBrowser changes

[Pierre-Yves Rivaille]

Hi,

I'm going to commit change to NSBrowser encoding.
The previous encoding was broken (deeply), and i doubt anyone is using
it within gorm files (or within anything).
So I'm going to commit the new encoding without providing support for
decoding old versions. But if someone needs the backward compatibility,
tell me and i'll add it.

bye,

        Pierre-Yves Rivaille