Add PYPI badge

README.rst

@@ -28,6 +28,9 @@ spirit of its sister project `PyCUDA <http://mathema.tician.de/software/pycuda>`
 * Broad support. PyOpenCL was tested and works with Apple's, AMD's, and Nvidia's 
   CL implementations.
 
+.. image:: https://badge.fury.io/py/pyopencl.png
+    :target: http://pypi.python.org/pypi/pyopencl
+
 To use PyOpenCL, you just need `numpy <http://numpy.org>`_ and an OpenCL
 implementation.
 (See this `howto <http://wiki.tiker.net/OpenCLHowTo>`_ for how to get one.)