fix Java related link in the Javascript section
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
Add Eloquent Javascript 2nd edition
Merge pull request #565 from JIghtuse/master

Add Eloquent Javascript 2nd edition
Remove duplicates (PostgreSQL/SQL section)
Added Google Shell Style Guide as Bash Ressource in the english ressource list
Merge pull request #567 from JIghtuse/master

Remove duplicates (PostgreSQL/SQL section)
Merge pull request #568 from gernd/master

Added Google Shell Style Guide as Bash Ressource in the english ressource list
Add Greek link to README.md
Create free-programming-books-gr.md
Merge pull request #569 from mankal111/master

Created Greek link in README.md and made "free-programming-books-gr.md" with some books
Alphabetizing README