Add two new courses

* Update free-courses-ru.md

Add three new courses

* Update free-courses-ru.md

Added authors of courses

Add new Java course from Stepik

* alphabetize added language courses

Our linter had not been looking at these languages

* fix books files

* casts and more

Add new Russian Ruby course

* reorganize files

1. make it easier to find files
2. reduce scrolling to get to README on main view of repo

* remove tr.txt again

Co-authored-by: NEric Hellman <eric@hellman.net>

Add new Ruby course

Add several courses and remove one of Java courses becouse it don`t exist

Remove book which was transferred into Russian books and add some new courses and categories (HTML, CSS)

* Add Go course

Add Russian Go course from stepik

* Add some courses

Add some new courses and new launguages (Kotlin, R), some fix (url and name) in old course PHP

Add Russian Go course from stepik

* Add Russian Solid and JS resource

* Fix error lint

* Adding c++ cource 

* adding course c++ at Stepik

* Fix passing travisci

Add blank line after Index section

* Fix Markdown Link

* Add line breaks Levels Heading

* Add courses from metarhia organization

* Alphabetic order
Co-authored-by: Nroman pedchenko <roman.pedchenko@dev-pro.net>

* add free courses ru nodejs and javascript

* change order

* fix incorrect line count

Update dead link of 3 courses to newer versions of the same courses.
It is the same author.

* Update free-courses-ru.md

* Update free-courses-ru.md

* add PHP course in russian

* PHP Russian basics

* blank lines fix

* add PHP to index

* reorder russian courses

and add link to readme

* О (cyrillic) not O

* Add Python courses

* Fix formatting

* Fix formatting