Modified ipython banner
Modified ipython banner

This is a squash of all the commits found in

    `https://github.com/ipython/ipython/pull/8773`

 - updated banner
 - updated banner again
 - fixed type
 - modified ipython banner
 - attempt at fixing rebase issues
 - modified ipython banner
 - fixed git screwup
 - updated banner
 - updated banner again
 - fixed type
 - fixed accidental deleted gui_reference restoration

ipython/ipython,ipython/ipython