Need translation of detailed description: Chinese Simplied

[gorhill]

Reference detailed description in https://github.com/gorhill/uBlock/blob/master/dist/DESCRIPTION-reference.

Detailed description must go in: https://github.com/gorhill/uBlock/blob/master/dist/DESCRIPTION-zh_CN.

It doesn't have to be an exact translation, what matters really is a good description of what the extension does, as per Opera web store requirements (issue #23). Just do what you think is best.

[gorhill]

Now on Crowdin.

[gorhill]

This was addressed by a contributor on Crowdin.