Add dev install code snippet to docs

docs/source/development_faq.rst

@@ -5,4 +5,15 @@ Developer FAQ
 
 1. How do I install a pre-release version such as a beta or release candidate?
 
-   ``python -m pip install notebook --pre --upgrade``
+.. code-block:: bash
+
+    python -m pip install notebook --pre --upgrade
+
+2. What are the basic steps for a development install?
+
+.. code-block:: bash
+
+    git clone https://github.com/jupyter/notebook
+    cd notebook
+    python setup.py js css
+    pip install -e .