Added Google Shell Style Guide as Bash Ressource in the english ressource list

Remove duplicates (PostgreSQL/SQL section)

Add Eloquent Javascript 2nd edition

Alphabetizing and adding a new book to Javascript

Added "Softwareentwicklung in C" to the German List as a C Programming R...

Update free-programming-books-de.md

fixed latex-reference title

fix Java related link in the Javascript section

Add effective django

Alphabetizing and 3 fixes

Update free-programming-books-zh.md

Add two books on OS and low-level programming

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

Added Just Enough Ruby to Get By

Add a section for official standards; add POSIX.

Corrected typo in index

Created initial Hungarian list

Under the Language Agnostic section, I've added a heading for standards documents, and started by adding the POSIX standard, which links to some instructions I've posted on how to access it without paying. I actually have a number of these, if you think it's the type of thing that would be useful on this list?