Massive package and module reorganization of all of IPython. * New top-level sub-packages have been created: :mod:`IPython.core`, :mod:`IPython.lib`, :mod:`IPython.utils`, :mod:`IPython.deathrow`, :mod:`IPython.quarantine`. All existing top-level modules have been moved to appropriate sub-packages. All internal import statements have been updated and tests have been added. The build system (setup.py and friends) have been updated. * Compatability modules have been created for :mod:`IPython.Shell`, :mod:`IPython.ipapi` and :mod:`IPython.iplib` that display warnings and then load the actual implementation from :mod:`IPython.core`. * :mod:`Extensions` has been moved to :mod:`extensions`.

Added to changes.txt.

Removing .hgignore.

Make %paste echo by default, introduce -q for quiet mode.

Improvements and bugfixes to %paste. - %paste -r was broken. Closes #412337 - Add -e to %paste to echo pasted text. Closes #412339

Work on Application and loader testing.

Added simple tests for IPython.config.loader.

Working version of the new config loaders for .py files and argparse.

Improvement to how config is handled in Components. When a Component gets a config object, it aways makes a deepcopy of it.

Fixing subtle bug in the traitlets with This. Previously subclasses This traitlets wouldn't accept superclass instances as values. I have added a this_class attribute to TraitletType that is set by the metaclass and is used later by This.validate to properly handle this case. I have also added new tests for this.