[zh_CN] done /zh/models/saving-your-data.rst
[zh_CN] follow en changes
[fr] corrections
Merge pull request #1926 from blackpuppy/zh

[zh_CN] done /zh/models/saving-your-data.rst
Remove third level nav elements.

Having extra nav elements is kind of nice but kind of a pain in the ass
as well. It creates painful maintenance busy work that is totally not
necessary as both the book and the api have version pickers.
Remove CSS for third level nav.
Added add() method to RecipesController REST example in japanese

Copy / Pasting the example worked fine except for the missing POST /recipes.json example: add() method was missing in japanese.
Merge pull request #1928 from oh240/master

Added add() method to RecipesController REST example in japanese