Update free-programming-books.md

Added in alphabetical order

free-programming-books.md

@@ -20,6 +20,7 @@
 * [Chapel](#chapel)
 * [Cilk](#cilk)
 * [Clojure](#clojure)
+* [Cloudera](#cloudera)
 * [COBOL](#cobol)
 * [CoffeeScript](#coffeescript)
 * [ColdFusion](#coldfusion)