smal fixes in docs

Author: jrief

docs/source/installation.rst

@@ -4,7 +4,7 @@
 Installation
 ============
 
-Install **django-admin-sortable2**. The latest stable release can be found on PyPI
+Install **django-admin-sortable2**. The latest stable release is available on PyPI
 
 .. code-block:: bash
 
@@ -30,5 +30,5 @@ In the project's ``settings.py`` file add ``'adminsortable2'`` to the list of ``
 	    ...
 	]
 
-The next step is to adopt the models in order to make them sortable. Please check the page
-:ref:`usage` for details.
+The next step is to adopt the models to make them sortable. Please check the page :ref:`usage` for
+details.

docs/source/usage.rst

@@ -4,8 +4,8 @@
 Using Admin Sortable
 ====================
 
-This library tries to not interfere with existing Django models. Instead it can be adopted to any
-class inheriting from :class:`~django.db.models.Model` provided that it offers a field for sorting.
+This library tries to not interfere with existing Django models. Instead it adopts any class
+inheriting from :class:`~django.db.models.Model`, provided it offers a field for sorting.
 
 
 Prepare the Model Classes