Add @mre's glorious slides

Fix #24

Author: killercup

_posts/2017-03-01-web-dev.md

@@ -12,6 +12,7 @@ talks:
     name: "Matthias Endler"
     twitter: matthiasendler
     github: mre
+  slides: "https://speakerdeck.com/mre/whats-so-hard-about-writing-a-slack-client-in-rust"
   abstract: |
     "I'll just write a simple API wrapper for that. Give me two hours." Does that sound oddly familiar? Don't be fooled: writing an easy to use, idiomatic abstraction layer is a lot of work - in any language. I want to tell you my story about writing a Slack client in Rust. From documentation to testing and error handling there's a lot of pitfalls to avoid and laughs to share.
 - title: "Diesel – Type Safe SQL"