Added "Scala Tutorial"

free-programming-books.md

@@ -1327,6 +1327,7 @@ See also [TeX](#tex)
 * [Scala & Design Patterns: Exploring Language Expressivity](http://www.scala-lang.org/old/sites/default/files/FrederikThesis.pdf) - Fredrik Skeel Løkke
 * [Scala for the Impatient (A1 Scala Level chapters)](http://typesafe.com/resources/book/scala-for-the-impatient) - Cay S. Horstmann
 * [Scala School by Twitter](http://twitter.github.io/scala_school/)
+* [Scala Tutorial](http://www.tutorialspoint.com/scala/scala_tutorial.pdf)
 * [The Neophyte's Guide to Scala](http://danielwestheide.com/scala/neophytes.html) - Daniel Westheide
 * [Xtrace](http://github.com/leithaus/XTrace/tree/monadic/src/main/book/content/)