Update README.md

Author: gorhill

README.md

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+**Important note:** This is a fork of the [new official repo](https://github.com/chrisaljoudi/uBlock). Although both project are essentially the same as of 0.9.3.0, they will probably start to diverge as time goes. I consider uBlock here to be feature-complete. I will keep maintaining the project here though so as to ensure it works just fine. If I add anything new, it will be because I decide to do so, for my own coding pleasure, as I do not accept any feature requests.
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