Merge pull request #517 from alexanderfefelov/master

Added Bitsavers.org

free-programming-books.md

@@ -141,6 +141,7 @@
 
 ###Meta-Lists
 * [25 Free Computer Science Ebooks](http://www.coderholic.com/25-free-computer-science-books/)
+* [Bitsavers.org](http://bitsavers.org/)
 * [Cheat Sheets (Free)](http://refcardz.dzone.com/)
 * [Free Smalltalk Books, collected by Stéphane Ducasse](http://stephane.ducasse.free.fr/FreeBooks.html)
 * [Free Tech Books](http://www.freetechbooks.com/)