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