#2494

* add Peter Wayner's Free for All
* add some author names in open source ecosystem section
* add some subtitles

to close #2491

* Update free-podcasts-screencasts-ru.md

* fix alphabetic order

* one more try

* fixed the last two misplaced authors

* Added "A Brief Introduction to Machine Learning for Engineers"

Link to page in arXiv, posted by the author of the book: https://arxiv.org/abs/1709.02840

* Added author to "A Brief Introduction to Machine Learning for Engineers"

* Added OWASP Testing Guide

* Added format type to OWASP Testing Guide

An incremental in-depth tutorial about building Java back-end web applications with Java Server Faces (JSF) as the user interface technology and the Java Persistence API (JPA) for object-to-storage mapping and storage management.

Ref:- http://web-engineering.info/tech/JavaJpaJsf/book/index.html

Author:- Mircea Diaconescu and Gerd Wagner

* Update free-programming-books.md

C Elements of Style was published by M&T books in 1992. This book covers only the C language and is a bit out dated. However it still contains a lot of good advice.

* add author

* Added "Türkçe Git 101"

* add back required space

* add go in action notes

* fix go in action notes title

* fix Alphabetical ordering

* fix zh charter order

* remove non-english resource

The old links aren’t valid anymore

* Add 4 books

* Alphabetic order and 2 more books

* Update free-programming-books-ru.md

* Update free-podcasts-screencasts-ru.md

* Update free-podcasts-screencasts-ru.md

* Update free-programming-books-ru.md

* Update free-programming-books-ru.md

* add required space, add clojure to index

* add pdf indication

* remove trailing slashed, fix "alphabetical" order

The thing that was confusing us is that the С was capitalized, so its code point was before lower case п, but the sorting is case insensitive. Oh my. This is why we need a robot that fixes these things.

* trailing slash

* Create free-programming-books-bl.md

* add spaces to satisfy linter

* ditto

* Add Scastie

* Fix 'Remove trailing slash' warning

* Uniform treatment of Leanpub books

free Leanpub books come in two flavors
- free to read online without an account or email address
- free to read after a "purchase" with a minimum price of "Free!" A
valid email is requested to create an account, but you can read   or
download even if the email is bogus.

After some consideration, I'm proposing that the free-to-read books
should be without any annotation, and the free-after-"purchase" books
be denoted as *(Leanpub Account or valid email requested)* . This PR
implements that for the english lists.

Comments requested!

* add required space

Book is not free. It's a minimum of $4 https://leanpub.com/whatsnewinjava8 .

Added reviewed books compiled from from StackOverflow documentation