Add chinese translation for reflex doc

[hustlei]

Could i add chinese translation for reflex manual, this pull request just include part of the chapters, and others will be pulled later.

[Robert-van-Engelen]

Thank you for your feedback and your contribution to the project. I hope you can complete the translation and post it online?

[hustlei]

I am doing that, it may take more time.

[genivia-inc]

Let me know when the documentation is ready to include with the project.