Update quickstart.rst doc for awareness of Flask extensions
diff --git a/docs/quickstart.rst b/docs/quickstart.rst
index 39957d7749..4906d02536 100644
--- a/docs/quickstart.rst
+++ b/docs/quickstart.rst
@@ -873,6 +873,15 @@ can do it like this::
     from werkzeug.contrib.fixers import LighttpdCGIRootFix
     app.wsgi_app = LighttpdCGIRootFix(app.wsgi_app)
 
+Using Flask Extensions
+----------------------
+
+Extensions are packages that help you accomplish common tasks. For
+example, Flask-SQLAlchemy provides SQLAlchemy support that makes it simple
+and easy to use with Flask.
+
+For more on Flask extensions, have a look at :ref:`extensions`.
+
 Deploying to a Web Server
 -------------------------
 

Addresses concerns in issue #532 regarding not knowing about flask extensions as it is not mentioned the quick start guide. Maybe this can help increase the awareness of flask extensions to new users?
