Fixed traceback from CompletionWidget when hideEvent is received when the widget is not visible

* Adding object_info_request support to prototype kernel. * Completion and calltips work again in FrontendWidget

* Refactored KernelManager to use Traitlets and to have its channels as attributes * QtSubChannel and QtXReqChannel work now * Progress on refactoring FrontendWidget to use KernelManager.

Suppress foolscap deprecation warnings, bug reported by Satra. Now we import foolscap components according to their api. I think these four files contain all the naked 'from foolscap import' statements we had, so all such warnings should be gone now.

Initial checkin of Qt kernel manager. Began refactor of FrontendWidget.

Merge branch 'master' of git://github.com/ipython/ipython into qtfrontend

Merge branch 'kernelproxy' into upstream_master

Work on the kernel manager.

Adding unit tests for Qt console frontend.

Adding __init__.py files to new package directories