* Bug fixes related to WebGL widget and ipywidgets version 6
3.5.6
* Updated WebGL widget to work with ipywidgets version 7
3.5.5
* Various fixed for Mercurius
3.5.4
* Bug fix for N_active=-1 (default)
3.5.3
* Allow for better parallelization of WHFast with OpenMP. * Addded example of the Solar System with Testparticles. * Made simulationarchive_append a public function (might be useful for some hacking projects).