Added Kotlin language and it's resources (#2561)

free-podcasts-screencasts-en.md

@@ -14,6 +14,7 @@
 * [Golang](#golang)
 * [Gulp](#gulp)
 * [Javascript](#javascript)
+* [Kotlin](#kotlin)
 * [Language Agnostic](#language-agnostic)
 * [Node.js](#Nodejs)
 * [PHP](#php)
@@ -129,6 +130,12 @@
 * [Screencast] - [Node Tuts - Node.JS Video Tutorials](http://nodetuts.com)
 
 
+### Kotlin
+
+* [Podcast] - [Talking Kotlin](http://talkingkotlin.com)
+* [Screencast] - [Kotlin Beginners Tutorials](https://www.youtube.com/playlist?list=PLpg00ti3ApRweIhdOI4VCFFStx4uXC__u)
+
+
 ### Language Agnostic
 
 * [Podcast] - [.NET Rocks!](https://www.dotnetrocks.com)