Add a vendor.rst doc.

docs/vendor.rst

@@ -0,0 +1,26 @@
+==============
+Vendor Library
+==============
+
+If you don't want to go mucking about with a virtual environment, or you
+want to share compiled packages between several installations, you can use
+the kitsune-lib vendor library. This is just a git repo with all our
+dependencies in it.
+
+The vendor library includes all the dependencies for both production and
+development environments.
+
+
+Using the Vendor Library
+========================
+
+Check out the library like so::
+
+    git clone --recursive git://github.com/jsocol/kitsune-lib.git ./vendor
+
+You'll want to stick that right in the Kitsune check out. Then all that's
+left is to install the compiled packages::
+
+    pip install -r requirements/compiled.txt
+
+You may need to ``sudo`` that, depending on your environment.