[Yaml-core] Notes and Good to go.

[T. O. <tra...@ru...>]

Oh, I should make one point: a clear distinction between semantic equality and 
structural equality. Obviously the later is no problem. 'x' == 'x'.

Anyway I'm done talking about this. I have other things to do. 

FYI, I like the new tag system. As for the variants, just please give me a 
reasonable name to grab on to so I can easily do implicit stuff with them if 
I want.

Thanks for the dialog! 
T.