ipcontroller/ipengine use the new clusterdir.py module.

Minor revisions to ipengine_config.py

The ipengine script has been refactored to use the new config system. It is also now a formal Application: IPython.kernel.ipengineapp

Removing old ipcontroller.py

Finished refactoring ipcontroller to be a proper application. * The :command:`ipcontroller` script has been refactored into a proper IPython application that uses the new config system. This also introduces the idea of an application directory, which for :command:`ipcontroller` is :file:`cluster_<profile>` by default. This cluster directory has the config file, the log directory and the security directory for the controller and engine.

Work on ipcontroller. * The IPControllerApp now uses ApplicationWithDir to manage the app_dir. * The setup.py script and ipcontroller script have been updated to use the new IPControllerApp. * launch_new_instance created and being used.

Moving ipcontrollerapp.py to its new location.

General work on the kernel config.

Remove usage of deprecated .message attribute of exceptions. This fixes https://bugs.launchpad.net/ipython/+bug/407836. The .message attribute of Exception is being deprecated in Python 2.6. All new code should simply use args[0] for this purpose. There are still a few places that modules in external use this. Hopefully these will be updated soon.

ipapi.get now returns None if there are no InteractiveShells running. It used to simply raise an IndexError, which was bad.

IPython dir has been renamed to .ipython on Windows. * The IPython directory on Windows has been renamed to :file:`.ipython` instead of the awkward :file:`._ipython`.

Fixed the %debug magic.

Merging upstream from trunk.

Continuing work on ipcontroller.

Work on refactoring ipcontroller to new config system.

Merging the new-extensions branch. * Previously, the latex Sphinx docs were in a single chapter. This has been fixed by adding a sixth argument of True to the ``latex_documents`` attribute of :file:`conf.py`. * The ``psum`` example in the MPI documentation has been updated to mpi4py version 1.1.0. Thanks to J. Thomas for this fix. * The top-level, zero-install :file:`ipython.py` script has been updated to the new application launching API. * The extension loading functions have been renamed to :func:`load_ipython_extension` and :func:`unload_ipython_extension`. * The :mod:`IPython.extensions.pretty` extension has been moved out of quarantine and fully updated to the new extension API. * New magics for loading/unloading/reloading extensions have been added: ``%load_ext``, ``%unload_ext`` and ``%reload_ext``.

Updating the what's new for this branch.

Fix in MPI psum example. Thanks to J. Thomas for updating the psum example to the mpi4py 1.1.0 API.

Added test for the pretty.py extension and fixed sphinx docs. * The pretty.py extension now has a proper test, although it is minimal. * The latex/pdf Sphinx docs were building as a *single* chapter. The fix was to add a 6th argument of True to the latex_documents entry in conf.py

Completed work on pretty.py extension. There is still not any testing, but I have to move on...