swarm: codebase split from go-ethereum (#1405)

dev/README.md

@@ -0,0 +1,20 @@
+Swarm development environment
+=============================
+
+The Swarm development environment is a Linux bash shell which can be run in a
+Docker container and provides a predictable build and test environment.
+
+### Start the Docker container
+
+Run the `run.sh` script to build the Docker image and run it, you will then be
+at a bash prompt inside the `swarm/dev` directory.
+
+### Build binaries
+
+Run `make` to build the `swarm`, `geth` and `bootnode` binaries into the
+`swarm/dev/bin` directory.
+
+### Boot a cluster
+
+Run `make cluster` to start a 3 node Swarm cluster, or run
+`scripts/boot-cluster.sh --size N` to boot a cluster of size N.