Add a script to run mezzanine tests.

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 *.pyc
 .svn
+mezzanine-git/

.hgignore

@@ -3,3 +3,4 @@ syntax: glob
 build/*
 dist/*
 filebrowser_safe.egg-info/*
+mezzanine-git/

README.rst

@@ -14,3 +14,8 @@ address these specific issues.
 
 For further details, see 
 `Why are Grappelli and Filebrowser Forked? <http://mezzanine.jupo.org/docs/frequently-asked-questions.html#grappelli-filebrowser-forks>`_.
+
+Development
+===========
+
+You can test your local branch against the latest mezzanine development version by running `./test.sh`.

test.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# Install latest mezzanine master branch.
+mezzanine="./mezzanine-git"
+if [ -d $mezzanine ]; then
+        git -C $mezzanine pull
+else
+        git clone --branch master --depth 1 https://github.com/stephenmcd/mezzanine.git $mezzanine
+fi
+pip install -U $mezzanine
+
+# Install filebrowser-safe.
+pip install -U -e .
+
+# Run mezzanine tests.
+(cd $mezzanine && python setup.py test)