Fixed docstring of IPython.kernel.__init__.

IPython/kernel/__init__.py

@@ -1,6 +1,10 b''
-msg = """IPython.kernel has been replaced by IPython.parallel.
+"""IPython.kernel has been replaced by IPython.parallel.
+
+The previous version of IPython's parallel library was located at this
+location (IPython.kernel). It has been moved to the IPython.parallel
+subpackage and has been refactored to use zeromq/pyzmq instead of twisted.
 
 Please see INSERT URL for further details.
 """
 
-raise ImportError(msg)
  No newline at end of file
+raise ImportError(__doc__)