add feature of customizing the attribute of avatar img

avatar/templates/avatar/avatar_tag.html

@@ -1 +1 @@
-<img src="{{ url }}" alt="{{ alt }}" width="{{ size }}" height="{{ size }}" />
+<img src="{{ url }}" alt="{{ alt }}" width="{{ size }}" height="{{ size }}" {% for key, value in kwargs.items %}{{key}}="{{value}}" {% endfor %}/>

avatar/templatetags/avatar_tags.py

@@ -70,12 +70,13 @@ def avatar(user, size=settings.AVATAR_DEFAULT_SIZE, **kwargs):
     else:
         alt = six.text_type(user)
         url = avatar_url(user, size)
-    context = dict(kwargs, **{
+    context = {
         'user': user,
         'url': url,
         'alt': alt,
         'size': size,
-    })
+        'kwargs': kwargs,
+    }
     return render_to_string('avatar/avatar_tag.html', context)
 
 

docs/index.txt

@@ -68,6 +68,10 @@ that are required. A minimal integration can work like this:
 
         {% avatar user 65 %}
 
+    Example for customize the attribute of the HTML ``img`` tag::
+
+        {% avatar user 65 class="img-circle img-responsive" id="user_avatar" %}
+
 Template tags and filter
 ------------------------
 
@@ -80,10 +84,11 @@ template rendering system::
     Renders the URL of the avatar for the given user. User can be either a
     ``django.contrib.auth.models.User`` object instance or a username.
 
-``{% avatar user [size in pixels] %}``
+``{% avatar user [size in pixels] **kwargs %}``
     Renders an HTML ``img`` tag for the given user for the specified size. User
     can be either a ``django.contrib.auth.models.User`` object instance or a
-    username.
+    username. The (key, value) pairs in kwargs will be added to ``img`` tag
+    as its attributes.
 
 ``{% render_avatar avatar [size in pixels] %}``
     Given an actual ``avatar.models.Avatar`` object instance, renders an HTML