Changed wording about UNSAFE_componentWillReceiveProps deprecation

[bvaughn]

I tried to compress this a little bit. (It's still a lot of words to have in one of our yellow "notes".) I also removed the misleading deprecation bit.

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[gaearon]

Maybe let's combine this with note at the bottom? And make that paragraph first?

Same for other methods.

[bvaughn]

Maybe let's combine this with note at the bottom? And make that first?

I don't mind moving the note near the bottom higher up, but I'm not sure "combining" them feels right. This is already a lot of text for what (I think) is intended to be a short format note.

Same for other methods.

Not sure what this means.

[gaearon]

I mean that other methods have the same note at the bottom and it’s very easy to miss. But arguably that’s the most important one and the one people most confused over. So I propose that every unsafe method starts with that note.

[bvaughn]

Oh, so~ move those notes higher for each lifecycle? Sure, I'm not opposed to that.

[bvaughn]

Okay I moved those comment blocks higher up.