Adding projectional editor paper, presented in Seattle papers we love in May 2017. (papers-we-love#457)

Author: Khalian

user_interfaces/README.md

@@ -1,3 +1,5 @@
 # User Interfaces
 
-[Squeak: a Language for Communicating with Mice](http://ordiecole.com/squeak/cardelli_squeak1985.pdf)
+* :scroll: [Squeak: a Language for Communicating with Mice](http://ordiecole.com/squeak/cardelli_squeak1985.pdf)
+
+* :scroll: [Projecting a modular future](http://www.voelter.de/data/pub/projectingModuleFuture.pdf)