Add Rust podcast "New Rustacean" (en) (#1982)

* Add Rust podcast "New Rustacean"

* Remove trailing slash

free-podcasts-screencasts-en.md

@@ -16,6 +16,7 @@
 * [PostgreSQL](#postgresql)
 * [Python](#python)
 * [Ruby](#ruby)
+* [Rust](#rust)
 * [Vim](#vim)
 
 
@@ -152,6 +153,11 @@
 * [Screencast] - [Ruby Videos, Tutorials and Screencasts](http://showmedo.com/videotutorials/ruby)
 
 
+### Rust
+
+* [Podcast] - [New Rustacean](http://www.newrustacean.com)
+
+
 ### Vim
 
 * [Screencast] - [Free screencasts about the text editor Vim](http://vimcasts.org)