Add LPAR slides.

bibs/myrefs.bib

@@ -65,6 +65,7 @@
   booktitle = lpar15,
   year      = 2015,
   jh        = yes,
+  slides    = yes,
   eprint    = yes,
   url       = {http://arxiv.org/abs/1509.03476},
 }

content/news.md

@@ -1,3 +1,5 @@
++ **11/2015** Slides now available for  **Relational reasoning via probabilistic
+coupling**, presented at **LPAR 2015**.
 + **11/2015** I will be serving on the External Review Committee of **PLDI
 2016**.
 + **11/2015** Our preprint **Do prices coordinate markets?** is now available on
@@ -8,5 +10,3 @@ is now available on `arXiv`.
 to **SODA 2016**!
 + **09/2015** Our paper **Relational reasoning via probabilistic coupling**
 has been accepted to **LPAR 2015**!
-+ **08/2015** Our preprint **Online assignment with heterogeneous tasks in
-crowdsourcing markets** is now available on `arXiv`.