Changes

The [[IPDL/Five minute example]] shows examples of what C++ code you need to implement to make IPDL "work." Before reading this, you should be somewhat familiar with the IPDL (or good at learning by example.)

The [[IPDL/Low level setup]] walks you through setting up the support infrastructure (processes, threads, and sockets) that IPDL needs to send messages. Few people should need to read this.