qtconsole should support --no-banner and custom banner

[ivanov]

This is not a big deal, but just a loose end that might be fun for someone to tie up. Both ipython and ipython console allow for a custom banner to be printed, and also allow for it to be disabled altogether, but that currently is not supported by the ipython qtconsole.

The relevant places to look are IPython/frontend/terminal/interactiveshell.py for the current implementation of banner1 and banner2, and the changes should probably be put inside IPython/frontend/qt/console/ipython_widget.py

[fperez]

Good catch, thanks @ivanov !

[takluyver]

This was (partly?) addressed by PR #4091 - the banner is now configurable, but there's no simple --no-banner flag for the command line. Do we need one?

[minrk]

I don't think the command-line flag is necessary, I would consider this addressed.

[takluyver]

OK, closing this.