Merge ~jugmac00/launchpad:add-how-to-use-updated-dependency into launchpad:master

[Jürgen Gmach]

Add "How to use an updated dependency" how-to document

[Najam Ahmed Ansari (nansari)]

review: Approve

diff --git a/doc/how-to/use-updated-dependency.rst b/doc/how-to/use-updated-dependency.rst
new file mode 100644
index 0000000..75628e1
--- /dev/null
+++ b/doc/how-to/use-updated-dependency.rst
@@ -0,0 +1,17 @@
+===========================
+Using an updated dependency
+===========================
+
+Whenever someone adds a new dependency or updates one,
+you need to both download the dependency and make a new build:
+
+.. code-block:: shell-session
+
+    $ rocketfuel-get
+    $ make build
+
+
+Further reading
+***************
+
+Please see :doc:`../explanation/pip`.
diff --git a/doc/index.rst b/doc/index.rst
index 13265a9..f967be6 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -34,6 +34,7 @@ How-to Guides
    how-to/new-user
    how-to/avoid-debugging-issues
    how-to/apply-schema-changes
+   how-to/use-updated-dependency
 
 Explanation
 ===========