diff --git a/README.rst b/README.rst
index 14932f7..eb72a05 100644
--- a/README.rst
+++ b/README.rst
@@ -34,8 +34,7 @@ To install ckanext-rating:
      . /usr/lib/ckan/default/bin/activate
 
 2. Install the ckanext-rating Python package into your virtual environment::
-
-     pip install ckanext-rating
+     pip install -e git+https://github.com/6aika/ckanext-rating.git#egg=ckanext-rating
 
 3. Add ``rating`` to the ``ckan.plugins`` setting in your CKAN
    config file (by default the config file is located at
diff --git a/ckanext/rating/__init__.py b/ckanext/rating/__init__.py
index e69de29..2e2033b 100644
--- a/ckanext/rating/__init__.py
+++ b/ckanext/rating/__init__.py
@@ -0,0 +1,7 @@
+# this is a namespace package
+try:
+    import pkg_resources
+    pkg_resources.declare_namespace(__name__)
+except ImportError:
+    import pkgutil
+    __path__ = pkgutil.extend_path(__path__, __name__)
diff --git a/ckanext/rating/logic/action.py b/ckanext/rating/logic/action.py
index 64e2ce2..0f20b79 100644
--- a/ckanext/rating/logic/action.py
+++ b/ckanext/rating/logic/action.py
@@ -50,7 +50,19 @@ def rating_package_create(context, data_dict):
 
     return Rating.get_package_rating(package.id)
 
+
+@toolkit.side_effect_free
 def rating_package_get(context, data_dict):
+    '''
+    Get the rating and count of ratings for a package.
+
+    Returns a dictionary containing rating and ratings counts.
+
+    :param package_id: the id of the package
+    :type package_id: string
+    :rtype: dictionary
+
+    '''
     package_id = data_dict.get('package_id')
 
     error = None
diff --git a/setup.py b/setup.py
index 83b2335..6cd1c68 100644
--- a/setup.py
+++ b/setup.py
@@ -55,6 +55,8 @@ setup(
     # simple. Or you can use find_packages().
     packages=find_packages(exclude=['contrib', 'docs', 'tests*']),
 
+    namespace_packages=['ckanext', 'ckanext.rating'],
+
     # List run-time dependencies here.  These will be installed by pip when your
     # project is installed. For an analysis of "install_requires" vs pip's
     # requirements files see: