add note about running the simulation

README.textile

@@ -2,3 +2,19 @@ h1. Flockers In Scala
 
 This is an implementation of a boids-like flocking simulation, written
 as part of "a tutorial demonstrating the use of MASON from Scala":http://pathdependent.com/computational_social_sciences/using-mason-from-scala/.
+
+h2. Running
+
+If you are not interested in the tutorial or prefer to read the code first,
+you may run setup and run this project by running:
+
+<code>
+git clone git://github.com/jbn/FlockersInScala.git
+cd FlockersInScala/
+./setup_mason.sh
+sbt run
+</code>
+
+You will be asked to select which executable (main class) to run. For the 
+Simulation with GUI, select <tt>com.pathdependent.flockers.FlockersWithUI</tt>.
+