Update RDC document

Update README.md to refer to document portal.

Change-Id: I427122751fec5a27936b345a3ac76c96478be164

python_binding/README.md

@@ -1,29 +1,36 @@
-* Quick start
+# Quick start
 If you do not have the RDC installed, please specify the RDC library path using:
-export LD_LIBRARY_PATH=<rdc_libs_path>
+
+    $ export LD_LIBRARY_PATH=<rdc_libs_path>
 
 Then you can run RdcReader in python_binding folder:
-python RdcReader.py
 
-* Prometheus plugin
+    $ python RdcReader.py
+
+# Prometheus plugin
 Install the prometheus_client:
-% pip install prometheus_client
+
+    $ pip install prometheus_client
 
 Start the rdcd with auth and then run plugin to connect to it:
-% python rdc_prometheus.py
+
+    $ python rdc_prometheus.py
 
 Check the options of the plugin:
-% python rdc_prometheus.py --help
+
+    $ python rdc_prometheus.py --help
 
 Verify the plugin is running:
-% curl localhost:5000
+
+    $ curl localhost:5000
 
 In the managment computer, install the Prometheus from
 https://github.com/prometheus/prometheus
 
 Modify the file prometheus_targets.json to add the compute nodes running the plugin.
 Start the Prometheus
-% prometheus --config.file=<full path of the rdc_prometheus_example.yml>
+
+    $ prometheus --config.file=<full path of the rdc_prometheus_example.yml>
 
 Browse to localhost:9090 in the managment computer for metrics from RDC.