Add an HTML and CSS Resource - Code a personal splash page in 1 hour: A Hands-on Intro to HTML & CSS
Add a section to put free courses that aren't in the 'book' format (video/etc)
Move the free video courses listed under free-programming-books.md, to the free-courses-en.md file
Merge pull request #833 from kenmazaika/splash-page

free-course-en init
[es] Adding book on software enginieering
Merge pull request #834 from esparta/master

[es] Adding book on software enginieering
Added books in czech language
Merge pull request #835 from grogy/add-czech-books

Added books in czech language
Fixed label of PDF files by list for contribute
Merge pull request #836 from grogy/fix-convention-for-contribute

Fixed label of PDF files by list for contribute
Added czech books about mathematic
Merge pull request #837 from grogy/czech-mathematic

Added czech books about mathematic
fixes multiple issues (broken links to be deleted)

fixes #738
fixes #727
fixes #725
added nicholas c. zakas understanding ECMAScript 6
Merge pull request #839 from hiteshtr/master

added nicholas c. zakas understanding ECMAScript 6
Merge pull request #838 from borgified/fix_738

fixes multiple issues (broken links to be deleted)
Added books by Peter Kropff
Verbesserungen
Merge pull request #840 from merkuriy/patch-1

[de] - Added books and slight improvements for German list
[pt_BR] - Kanban e Scrum - Fixes #832