Mark 2.2.X as incompatible with Django 1.7

Author: acdha

README.rst

@@ -48,6 +48,9 @@ Haystack has a relatively easily-met set of requirements.
 * Python 2.6+ or Python 3.3+
 * Django 1.5+
 
+ .. warning::
+     Django 1.7 is currently unsupported until the release of v2.3. See https://github.com/toastdriven/django-haystack/issues/1067
+
 Additionally, each backend has its own requirements. You should refer to
 http://django-haystack.readthedocs.org/en/latest/installing_search_engines.html for more
 details.

setup.py

@@ -8,7 +8,7 @@
     from setuptools import setup
 
 install_requires = [
-    'Django',
+    'Django<1.7',
 ]
 
 tests_require = [
@@ -27,7 +27,7 @@
 
 setup(
     name='django-haystack',
-    version='2.2.0',
+    version='2.2.1',
     description='Pluggable search for Django.',
     author='Daniel Lindsley',
     author_email='[email protected]',