add theory section (vs algorithms or misc), seed with network theory book
Professional Assembly Language book
racket guide
Added Learn CF in a Week book link
Update free-programming-books.md
Added Android Programming books.
Added Ulrich Drepper's "What Every Programmer Should Know About Memory"
Added Ada and JavaScript books

Ada 95 by John English
Ada Distilled by Richard Riehle
Ada for Software Engineers by M. Ben-Ari
JavaScript Bible by Danny Goodman

(from the r/programming thread)
Added LaTeX Wikibook
add a new, and very excellent, R book
Merge pull request #80 from woodwardjd/add-network-theory-book

add theory section (vs algorithms or misc), seed with network theory book
Merge pull request #84 from joao29a/master

Professional Assembly Language book and Racket guide
Merge pull request #85 from atuttle/patch-1

Added Learn CF in a Week book link
Merge pull request #86 from vandersonmr/master

More Lua books
Merge pull request #87 from hiyou102/patch-1

Added Android Programming books.
Merge pull request #88 from briangordon/patch-1

Added Ulrich Drepper's "What Every Programmer Should Know About Memory"
Merge pull request #91 from jbx/patch-1

Added Ada and JavaScript books
Merge pull request #92 from huwr/master

Added LaTeX Wikibook
Merge pull request #93 from kevinushey/patch-1

add a new, and very excellent, R book
formatting fix