Update free-programming-books-zh.md

added a few more Chinese resources:
   - The Little MongoDB Book 中文版
   - 文章《Functional Programming For The Rest of Us》的中文翻译
Merge pull request #557 from JIghtuse/master

Add two books on OS and low-level programming
Merge pull request #556 from justinyhuang/patch-1

Update free-programming-books-zh.md
Alphabetizing English Index & 1 fix
2 link fixes
Merge pull request #558 from MHM5000/master

Alphabetizing and 3 fixes
fix Java related link in the Javascript section
Add effective django
Merge pull request #560 from casual-passer/master

Add effective django
Merge pull request #559 from phndiaye/master

fix Java related link in the Javascript section
Update free-programming-books-de.md

fixed latex-reference title
Merge pull request #561 from schwindp/patch-1

Update free-programming-books-de.md
Added "Softwareentwicklung in C" to the German List as a C Programming Ressource
Merge pull request #563 from gernd/master

Added "Softwareentwicklung in C" to the German List as a C Programming R...
Alphabetizing Javascript
Book of Modern Frontend Tooling
Merge pull request #564 from MHM5000/master

Alphabetizing and adding a new book to Javascript