propagated some more changes from 2.3 to trunk

doc/opencv2/py/introduction.rst

@@ -0,0 +1,37 @@
+************
+Introduction
+************
+
+
+Starting with release 2.0, OpenCV has a new Python interface. This replaces the previous 
+`SWIG-based Python interface <http://opencv.willowgarage.com/wiki/SwigPythonInterface>`_
+.
+
+Some highlights of the new bindings:
+
+
+
+    
+
+* single import of all of OpenCV using ``import cv``
+    
+
+* OpenCV functions no longer have the "cv" prefix
+    
+
+* simple types like CvRect and CvScalar use Python tuples
+    
+
+* sharing of Image storage, so image transport between OpenCV and other systems (e.g. numpy and ROS) is very efficient
+    
+
+* complete documentation for the Python functions
+    
+    
+This cookbook section contains a few illustrative examples of OpenCV Python code.
+
+
+.. toctree::
+    :maxdepth: 2
+
+    cookbook