Renumbered styles to flow better

14-letterbox/README.md

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+Style #11
+==============================
+
+Constraints:
+
+- The larger problem is decomposed into 'things' that make sense for
+  the problem domain 
+
+- Each 'thing' is a capsule of data that exposes one single procedure,
+  namely the ability to receive and dispatch messages that are sent to
+  it
+
+- Message dispatch can result in sending the message to another capsule
+
+Possible names:
+
+- Letterbox
+- Messaging style
+- Objects
+- Actors