Update docs translation in Chinese

[Atlasoin]

For the issue https://github.com/HelloZeroNet/ZeroNet-kivy/issues/55

Besides, in the https://github.com/HelloZeroNet/ZeroNet-kivy/blob/master/Tutorial-of-packaging-APK.md, the last ### building part is duplicated with the ### Vagrant part? If you think the last part should be removed, also remove the last part in Chinese version.(Or I can remove it, too)