Added preliminary editor support to IPythonWidget.

Initial refactoring to support structured traceback information.

Prompt messages are now implemented for both in/out prompts.

added parallel message docs to development section

Integrated new IPythonInputSplitter into IPythonWidget.

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

Fixed bug with ConsoleWidget smart paste.

Initial support in ipkernel for proper displayhook handling.

Fixed rare bug with continuation prompt deletion.

Set more tolerable default colors for ANSI color codes.