Tidy up code/docstrings

lib/python/xap_client/readme.md

@@ -0,0 +1,18 @@
+# XAP python3 bindings
+
+## Example
+```python
+from xap_client import XAPClient
+
+# List Available Devices
+devices = XAPClient.devices()
+selected = devices[0]
+
+# Connect then run commands
+with XAPClient().connect(selected) as dev:
+    print(dev.version())
+```
+
+## API
+
+TODO