Update the stackdriver getting started notebook. (#32)

* Rename the Monitoring folder to 'Stackdriver Monitoring'.

* Update the stackdriver getting started notebook.

The notebook is modified so that it handles projects with a large number
of GCE instances better. Instead of showing the timeseries for all
instances, the notebook now does so for instances matching a given
prefix.

Also, the output of the help is updated to reflect the underlying code
changes.

Author: supriyagarg

Readme.ipynb

@@ -112,7 +112,7 @@
     "### Stackdriver Monitoring\n",
     "\n",
     "The tutorials for this module use a sample project. This project is not readable by everyone. In order to execute the tutorials, you will have to set a default project, and make sure that it has at least one GCE Instance.\n",
-    "* [**Getting Started**](tutorials/Monitoring/Getting started.ipynb) - Cloud Datalab allows you to access and analyze the monitoring data. For an overview of how to access the timeseries data, start here."
+    "* [**Getting Started**](tutorials/Stackdriver Monitoring/Getting started.ipynb) - Cloud Datalab allows you to access and analyze the monitoring data. For an overview of how to access the timeseries data, start here."
    ]
   },
   {