Add article about DW1000 to newsletter

It feels wrong to add this under "Highlights", but according to the comments, that's where everything that's not a crate release should go.

Author: hannobraun

content/2020-02-29-newsletter-24.md

@@ -44,6 +44,8 @@ TODO Add news related to embedded Rust that are not about new crates releases he
 
 - TODO(remove, this is an example) the Rust compiler has gained cross compilation support for the Xtensa architecture!
 
+- [@hannobraun][@braun-embedded] wrote an [article about his DW1000 driver][dw1000].
+
 ## Embedded Projects
 
 <!--
@@ -77,6 +79,7 @@ you would like for yourself.
 [@dbrgn]: https://github.com/dbrgn
 [@rnestler]: https://github.com/rnestler
 [@ra-kete]: https://github.com/ra-kete
+[@braun-embedded]: http://github.com/braun-embedded
 
 <!--
 TODO: Put all links for content here.
@@ -87,6 +90,7 @@ TODO: Put all links for content here.
 [samd-timer]: https://github.com/proman21/samd-timer/
 [atsamd-hal]: https://github.com/atsamd-rs/atsamd/
 [microfft]: https://crates.io/crates/microfft
+[dw1000]: https://braun-embedded.com/dw1000/
 
 ## `embedded-hal` Ecosystem Crates