Update readme

Author: stefanw

README.rst

@@ -12,17 +12,15 @@ deleting objects in a Haystack_ search index.
 Requirements
 ------------
 
-* Django 1.4+
-* Haystack_ `1.2.X`_ *or* `2.X`_
+* Django 1.8+
+* Haystack_ `2.X`_
 * Celery_ 3.X
 
 You also need to install your choice of one of the supported search engines
 for Haystack and one of the supported backends for Celery.
 
 
 .. _Haystack: http://haystacksearch.org
-.. _`1.2.X`: http://pypi.python.org/pypi/django-haystack/1.2.5
-.. _`2.X`: https://github.com/toastdriven/django-haystack/tree/master
 
 Installation
 ------------
@@ -31,52 +29,17 @@ Use your favorite Python package manager to install the app from PyPI, e.g.::
 
     pip install celery-haystack
 
-By default a few dependencies will automatically be installed:
 
-- django-appconf_ -- An app to gracefully handle application settings.
-
-- `django-celery-transactions`_ -- An app that "holds on to Celery tasks
-  until the current database transaction is committed, avoiding potential
-  race conditions as described in `Celery's user guide`_."
+For Django < 1.9 you need to install `django-transaction-hooks`_ -- an app that
+brings transaction commit hooks to Django.
 
 .. _django-appconf: http://pypi.python.org/pypi/django-appconf
-.. _`django-celery-transactions`: https://github.com/chrisdoble/django-celery-transactions
-.. _`Celery's user guide`: http://celery.readthedocs.org/en/latest/userguide/tasks.html#database-transactions
+.. _`django-transaction-hooks`: https://github.com/carljm/django-transaction-hooks
+
 
 Usage
 -----
 
-Haystack 1.X
-~~~~~~~~~~~~
-
-1. Add ``'celery_haystack'`` to the ``INSTALLED_APPS`` setting
-
-   .. code:: python
-
-     INSTALLED_APPS = [
-         # ..
-         'celery_haystack',
-     ]
-
-2. Alter all of your ``SearchIndex`` subclasses to inherit from
-   ``celery_haystack.indexes.CelerySearchIndex``
-
-   .. code:: python
-
-     from haystack import site, indexes
-     from celery_haystack.indexes import CelerySearchIndex
-     from myapp.models import Note
-
-     class NoteIndex(CelerySearchIndex):
-         text = indexes.CharField(document=True, model_attr='content')
-
-     site.register(Note, NoteIndex)
-
-3. Ensure your Celery instance is running.
-
-Haystack 2.X
-~~~~~~~~~~~~
-
 1. Add ``'celery_haystack'`` to the ``INSTALLED_APPS`` setting
 
    .. code:: python