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.

resrc.io has been permanently taken down. Linked to snapshot on web.archive.org.