Merge remote-tracking branch 'upstream/master'

Because I contributed something

free-programming-books-ru.md

@@ -244,7 +244,7 @@
 
 ### Rust
 
-* [Язык программирования Rust](http://kgv.github.io/rust_book_ru/)
+* [Язык программирования Rust](http://rurust.github.io/rust_book_ru/)
 
 
 ### Scala

free-programming-books.md

@@ -1924,6 +1924,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 * [Rust by Example](http://rustbyexample.com)
 * [Rust for Rubyists](http://www.rustforrubyists.com/book/index.html)
 * [The Rust Programming Language](http://doc.rust-lang.org/book/)
+* [The Rustonomicon](https://doc.rust-lang.org/nomicon/)
 * [Why Rust?](http://www.oreilly.com/programming/free/files/why-rust.pdf) (PDF)