Update README.md

[dantiodev]

Slightly improve phrasing/structuring

[ghost]

I think "by you" is probably necessary. I essentially copy pasted this from the "5. Submission of Contributions" section in the Apache License. IANAL, so I don't know what's the proper wordology here.

[ghost]

Yeah generally I think the "you" emphasis is a bit weird but makes things clearer and it may have some subtle differences in legal interpretations. I'd prefer keeping it as is.

[dantiodev]

Readded. I agree, better to be safe rather than sorry.

[ghost]

Nit: also re-add the "you" in the first part too. Presumably, the current phrasing could let someone else make the explicit notice, not the actual contributor themselves.

[dantiodev]

That should be all, yes?