Proposed new feature or change:

Currently, the default values of matplotlib.animation.FuncAnimation for repeat as well as repeat_delay are used. Users cannot change these.
This might be especially interesting for saving animations as gif.

Todos:

• repeat_delay, repeat, cache_frame_data
• change in plot.animate_trajectory
• change in trajectory.Particle/FieldTrajectory.animate
• change in plot.create_video