Jupyter notebook examples for InteractionKernel

[CKehl]

Create a good, illustrative example Jupyter notebook (in collaboration with @fedeguerr @pdnooteboom and @mikaelk ) demonstrating the interaction kernel usage, as well as including the following things:

• execution order matters: regular kernel + manipulate -> regular kernel + manipulate -> ... -> [interaction kernel -> check execution -> apply interaction changes] -> [interaction kernel -> check execution -> apply interaction changes] ...
• performance benchmarks and conclusions
• limitations of particle-particle interaction

(subtasks still to-be-done)