Add Rails 4 ebook

add JSBooks to meta-lists

learn to program

Found a collection of free JS ebooks - the meta-lists section seemed the most approprate place to put this.

Few books from hackershelf; add APL

Italian tranlation of How To Think Like a Computer Scientist

Added book to Parallel Programming section

Added Data Mining and Analysis to Datamining section

Update free-programming-books.md

Update English Free Programming Books list.

Added a link to my Python programming book's blog

Deleted and merged two entries for Addy Osmani's book:Learning JavaScript Design Patterns (name was changed when it was published). Added a few author names to the Javascript section as well as Noel Rappin's great book Managing Space and Time With JavaScript.

Added Think Like (a) Git to the Git book list.

Added "Wie werde ich unix guru" to DE

added git section and pro git book

Add a link to Mother Tongues of Computer Languages Poster

Update free-programming-books.md

Added book to Machine Learning section

Great poster!

I added some more Free Python sources and a link to PDF file.

Textbook draft of Probabilistic Models in the Study of Language.

Added the HoTT book.

Add more books to the list and fixed markdown

Add some ruby books and courses

Added C++ online site, learncpp.com