Update free programming books it (#2867)

* Update free programming books it

* UPDATE free-programming-books in italian

* Added year of pubblication of the js course

* Update year of pubblication in italian

* Added author to js course

* Removed trailing slash from URL

* Update README

* Update Readme with CC BY licence

* DRY: link to LICENSE.md, not to CC. also spelling

README.md

@@ -85,3 +85,6 @@ Free Podcasts and Screencasts:
 
 ### Programming Playgrounds
 + [Free Programming Playgrounds](/free-programming-playgrounds.md)
+
+## License
+Each file included in this repository is licensed under the [CC BY License](/LICENSE.md).

free-programming-books-it.md

@@ -144,6 +144,7 @@
 
 ### JavaScript
 
+* [Corso completo Javascript](https://www.grimaldi.napoli.it/pdf/manuale_unite_224_2_html_1000213680.pdf) - [HTML.it](http://www.html.it) _Anno di pubblicazione_ 2005 (PDF)
 * [Guida Completa sviluppo lato Client](http://www.aiutamici.com/PortalWeb/eBook/ebook/Alessandro_Stella-Programmare_per_il_web.pdf) (PDF) (Includo anche Jquery)
 * [Guida di riferimento](http://lia.deis.unibo.it/Courses/TecnologieWeb0809/materiale/laboratorio/guide/JScriptRef_Ita.pdf) (PDF)