Execute code on IPython interpreter (remove added -u flag)

Hi,

first of all thanks for your great package!

I am using it mainly for Python which works perfectly if I create a profile for a standard interpreter within an Anaconda environment:

[Command: /home/cord/.anaconda3/bin/python3.5 -u /home/cord/Programmierung/oemof/examples/solph/simple_dispatch/simple_dispatch.py]
...some output of the file...

But this does not work for an IPython interpreter within the same environment:

[Command: /home/cord/.anaconda3/bin/ipython3 -u /home/cord/Programmierung/oemof/examples/solph/simple_dispatch/simple_dispatch.py]
...
[TerminalIPythonApp] CRITICAL | Bad config encountered during initialization:
[TerminalIPythonApp] CRITICAL | Unrecognized flag: '-u'

Obviously it does not work because the flag `-u` is added in the call of the shell.

Is there a way to fix this and send code to IPython?

Cheers
Cord