add la chapter & paper presented

README.md

@@ -14,6 +14,7 @@ Here are our official chapters. Let us know if you are interested in [starting o
 * [San Francisco](http://www.meetup.com/papers-we-love-too/) || [Meetup list](https://github.com/papers-we-love/papers-we-love/tree/master/_meetups/SanFrancisco)
 * [Chicago](http://www.meetup.com/Papers-We-Love-Chicago)
 * [London](http://www.meetup.com/papers-we-love-london)
+* [Los Angeles](http://www.meetup.com/papers-we-love-la)
 * [Colorado](http://papersweloveco.org)
 * [Ohio](http://www.meetup.com/Papers-We-Love-Columbus/)
 * [Berlin](http://www.meetup.com/Papers-We-Love-Berlin/)

distributed_systems/README.md

@@ -82,6 +82,8 @@
 
 * [The Dangers of Replication and a Solution](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.21.2707&rep=rep1&type=pdf)
 
+* [The Join Calculus: a Language for Distributed Mobile Programming](http://research.microsoft.com/en-us/um/people/fournet/papers/join-tutorial.pdf)
+
 * [The Part-Time Parliament](http://research.microsoft.com/en-us/um/people/lamport/pubs/lamport-paxos.pdf)
 
 * [There Is More Consensus in Egalitarian Parliaments](https://www.cs.cmu.edu/~dga/papers/epaxos-sosp2013.pdf)
@@ -100,6 +102,7 @@
 
 * [VL2: A Scalable and Flexible Data Center Network](http://research.microsoft.com/pubs/80693/vl2-sigcomm09-final.pdf)
 
+
 ## Related Works
 
 ### [“On the Electrodynamics of Moving Bodies” (1905) — Einstein](../historical/physics/on-the-electrodynamics-of-moving-bodies.pdf)