Update readme

README.md

@@ -1,9 +1,15 @@
 # Fake CAS
 
-Download the binary from [here](https://github.com/CenterForOpenScience/fakecas/releases/download/0.1.0/fakecas)
+Download the binary from [here](https://github.com/CenterForOpenScience/fakecas/releases/download/0.2.0/fakecas)
 
 ```bash
 cd ~/Downloads # cd to where you downloaded the file to
 chmod +x fakecas # Make the server executable
 ./fakecas # Run the server
+
+./fakecas -h  # Print possible configuration options
+# Usage of ./fakecas:
+#   -dbaddress="localhost:27017": The address of your mongodb. ie: localhost:27017
+#   -dbname="osf20130903": The name of your OSF database
+#   -host="localhost:8080": The host to bind to
 ```