Merge branch 'master' of github.com:vhf/free-programming-books
Merge remote-tracking branch 'central/master'
Merge remote-tracking branch 'central/master'
Merge remote-tracking branch 'central/master'
fixes #961
updated: Github's new markdown feature

https://github.com/blog/1841-nested-task-lists
No more unicode checkboxes
Merge branch 'master' of github.com:vhf/free-programming-books
Deleting Colons

no need for them, too.
Update free-courses-en.md
Included jquery and JS tuts from codecademy..
Sorted Index and ios section
Sorted Java & Python courses., 

Removed interactive tutorial from javascript..
Merge pull request #976 from avinoth/master

Sorted Courses section & added two courses in interactive tutorial
Merge branch 'master' of github.com:vhf/free-programming-books
+ A Visual Git Reference
Extra line
Merge pull request #977 from hoganlong/alpha-en

A Visual Git Reference
Removed Explore flask link - not free
sorted things..