License.rst: doc that font awesome is included in qfq, update some download links to github.

Documentation/License.rst

@@ -30,6 +30,8 @@ Software distributed together with QFQ
 * jQuery - http://jquery.com
 * jQWidgets - https://www.jqwidgets.com
 * Bootstrap - http://getbootstrap.com
-* Fabric.js - http://fabricjs.com
+* Fabric.js - https://github.com/fabricjs/fabric.js/tree/master
 * Chart.js - https://github.com/nnnick/Chart.js.git
 * sendEmail - https://github.com/mogaal/sendemail
+* Font Awesome - https://github.com/FortAwesome/Font-Awesome
+* Tablesorter - https://mottie.github.io/tablesorter/docs/index.html