Also, changing the link to a faster one

Ruby on Rails link update (Ruby on Rails Tutorial: Learn Rails By Example)

Changes made in the iOS section:
- Link to Start Developing iOS Apps Today is dead, replaced with one alive found on Google.
- Added the Swift version (only one currently available and updated, on Apple's website) of the guide (only available in HTML)

Added **Mostly Adequate Guide to Functional Programming** to Programming Paradigms

Added JavaScript For Cats
An introduction for new programmers
http://jsforcats.com/

Added category for embedded programming with three starting resources

Updated the alphabetical order of books under CoffeeScript

Added the "CoffeeScript Cookbook" book URL under the CoffeeScript section.

add a new great free online book (Adaptive Web Design) to HTML / CSS section

add why rust from oreilly

change "A" to "The" in "The Haskell School of Music" to match the title on the site.
change Django version number on "Test-Driven Web Development with Python" to 1.8. As the author notes [here](http://chimera.labs.oreilly.com/books/1234000000754/pr02.html#ftn.id619210), he updated the book for 1.8 in Spring 2015, since it's an LTS version.

Move links from free books to free courses.