Fix running of testsuite when installed (#223).

NEWS

@@ -5,6 +5,9 @@
   * In dulwich.index.build_index_from_tree, by default
     refuse to create entries that start with .git/.
 
+  * Fix running of testsuite when installed.
+    (Jelmer Vernooij, #223)
+
 0.9.8	2014-11-30
 
  BUG FIXES

setup.py

@@ -76,6 +76,7 @@ setup(name='dulwich',
       in the particular Monty Python sketch.
       """,
       packages=['dulwich', 'dulwich.tests', 'dulwich.tests.compat', 'dulwich.contrib'],
+      package_data={'': ['../docs/tutorial/*.txt']},
       scripts=['bin/dulwich', 'bin/dul-receive-pack', 'bin/dul-upload-pack'],
       classifiers=[
           'Development Status :: 4 - Beta',