Add manuel as test dependency

setup.py

@@ -12,7 +12,6 @@ import glob
 import os
 for f in glob.glob(os.path.join('slapos', 'rebootstrap', '*.txt')):
   long_description += '\n' + open(f).read() + '\n'
-
 setup(
   name=name,
   version=version,
@@ -45,6 +44,7 @@ setup(
     ],
   tests_require=[
       'zope.testing',
+      'manuel'
     ],
   test_suite='%s.tests.test_suite' % name,
 )