Fix method name and update CHANGELOG/whats_new.

Author: rhattersley

CHANGELOG

@@ -1,3 +1,8 @@
+2014-05-14 Added Axes.add_image() as the standard way to add AxesImage
+           instances to Axes. This improves the consistency with
+           add_artist(), add_collection(), add_container(), add_line(),
+           add_patch(), and add_table().
+
 2014-05-02 Added colorblind-friendly colormap, named 'Wistia'.
 
 2014-04-27 Improved input clean up in Axes.{h|v}lines

doc/users/whats_new.rst

@@ -166,6 +166,13 @@ Larry Bradley fixed the :func:`~matplotlib.pyplot.errorbar` method such
 that the upper and lower limits (*lolims*, *uplims*, *xlolims*,
 *xuplims*) now point in the correct direction.
 
+More consistent add-object API for Axes
+```````````````````````````````````````
+Added the Axes method :meth:`~matplotlib.axes.Axes.add_image` to put image
+handling on a par with artists, collections, containers, lines, patches,
+and tables.
+
+
 Date handling
 -------------
 

lib/matplotlib/axes/_base.py

@@ -1457,7 +1457,7 @@ def add_collection(self, collection, autolim=True):
         collection._remove_method = lambda h: self.collections.remove(h)
         return collection
 
-    def add_line(self, image):
+    def add_image(self, image):
         """
         Add a :class:`~matplotlib.image.AxesImage` to the axes.