Add a simple readme

README.md

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+# BaaS
+
+Just some test code to hammer disk I/O on various machines
+
+### targets.yml
+
+This file is where all the hosts and some of the configuration information
+goes, e.g.:
+
+
+```
+defaults:
+    username: ubuntu
+    timeout: 30
+hosts:
+    "my-private-cloud-vm":
+        hostname: "14.4.4.23"
+        username: tyler
+        metadata:
+            cloud: "OpenStax"
+            region: "West US"
+            type: "m1.medium"
+
+```
+
+### Running
+
+ 1. `bundle install`
+ 1. `./baas` will generate the `results/` files
+ 1. `./reporter` will generate `report.csv` which is a cumulative report for
+    all `hosts`