Add test for missing input encoding. Back to 100% coverage.

Setting the input buffer now respects HTML continuation prompts.

* Moved AnsiCodeProcessor to separate file, refactored its API, and added unit tests. * Improved traceback display. * Modified FrontendWidget to use tabs instead of spaces for convenient deletion.

* IPythonWidget now has IPython-style prompts that are futher stylabla via CSS * Added support for HTML to ConsoleWidget * General cleanup and refactoring.

Added banners to FrontendWidget and IPythonWidget.

Kernel subprocess parent polling is now implemented correctly for Unix.

Kernel subprocess parent polling is now implemented for Windows.

Draft of debugging the multiple inheritance problems in km. * Added __init__ methods to KernelManager classes. * Played with multiple inheritance between the Qt and non-Qt classes. * But, the prompt doesn't show up for the first line of input???

Clearing the ConsoleWidget now cancels reading, which is the intuitive behavior.

Fixed bug where syntax highlighting was enabled during raw_input mode.