Update free-programming-books-gr.md
add Coffeescript Style Guide
fix the inde
Added HTML/CSS and Swift courses
Updated link
Merge pull request #2 from vhf/master

sync with vhf:master
Merge pull request #3 from vhf/master

sync with vhf:master
Merge pull request #4 from vhf/master

sync with vhf:master
Added Markdown & reStructuredText in -zh.md
Merge branch 'master' of https://github.com/sunxb10/free-programming-books
fixed formatting
Dart added
Merge pull request #1106 from katgironpe/master

Added Vic Ramon's Ember tutorial
Merge pull request #1101 from mhmmdd/master

Dart added
Merge pull request #1097 from sunxb10/master

Added Markdown & reStructuredText in -zh.md
the link to the free version is now dead.
links to free version are all dead
Merge pull request #1108 from Gluejar/master

the link to the free version is now dead.
Update free-programming-books.md
Update free-programming-books.md