Merge pull request
#3538 from minrk/launch_ip
add IPython.start_ipython
A public API for starting a real (non-embedded) IPython instance.
should avoid API breakage in the future due to simple module renames, as has just happened with the removal of frontend.
For implementation purposes, I have added launch_new_instance as a classmethod on Application. I did this, because I wanted to add the ability to pass arguments to the instance, and didn't want to manually update every duplicate launch_new_instance.
closes
#1537
