Merge pull request #2271 from minrk/display_send_figure use display instead of send_figure in inline backend hooks This lets custom display functions (e.g. HTML) be used without any extra changes (see #2234). possible downsides: * The previous code guarantees that only one format is published. If multiple figure formatters are registered, display will send them all. * If people for some reason disable the type-printers, then they will display the automatic figure display. **Backwards-incompatible change** Note that `IPython.zmq.pylab.backend_inline.send_figure` has been removed, as `display()` can do the same job and we avoid an unnecessary special-case code path.