Pin zope.app.wsgi to <4.0dev to avoid test failures

.gitignore

@@ -0,0 +1,6 @@
+*.pyc
+.installed.cfg
+bin/
+develop-eggs/
+eggs/
+*.egg-info/

buildout.cfg

@@ -1,6 +1,11 @@
 [buildout]
 develop = .
-parts = test coverage-test coverage-report
+parts = py test coverage-test coverage-report
+
+[py]
+recipe = zc.recipe.egg
+interpreter = py
+eggs = ${test:eggs}
 
 [test]
 recipe = zc.recipe.testrunner
@@ -15,4 +20,12 @@ defaults = ['--coverage', '../../coverage']
 recipe = zc.recipe.egg
 eggs = z3c.coverage
 scripts = coverage=coverage-report
-arguments = ('coverage', 'coverage/report')
+arguments = ('coverage', 'coverage/report')
+
+[versions]
+# zope.app.wsgi 4.0.0a3 requires that you depend on zope.app.wsgi[testlayer]
+# if you want to import zope.app.wsgi.testlayer.  But if we do that, then
+# we drop compatibility with zope.app.wsgi 3.15.0, which is the latest final
+# release.  Workaround: pin zope.app.wsgi for now.  When zope.app.wsgi 4.0.0
+# final comes out, we can fix our install_requires and remove this pin.
+zope.app.wsgi = < 4.0dev