Add README

README.md

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+# QFlow
+Replicates traffic to various http endpoints backed by a durable queue.
+
+# Usage
+```
+Replicates traffic to various http endpoints backed by a durable queue
+
+This tool helps replicate to various http endpoints backed by a
+durable disk queue in the event of failures or slowdowns.
+
+Usage:
+  qflow [flags]
+
+Flags:
+  -a, --addr string       listen addr (default ":8080")
+  -c, --config string     config file for the clusters in yaml format
+  -d, --data-dir string   data directory for storage
+      --debug             enable debug logging
+  -h, --help              help for qflow
+
+$ qflow --help
+$ qflow -c config.yml -d ./data
+INFO[2018-08-15T15:07:11Z] registered (example1) with endpoints: [http://localhost:9090]
+INFO[2018-08-15T15:07:11Z] config options: (http timeout: 10s, maxMsgSize: 10485760)
+INFO[2018-08-15T15:07:11Z] listening on :8080
+```