Update the docstrings and default values for the scheduling arguments of most objects.
Update the docstrings and default values for the scheduling arguments of `SpatialNeuron`
Update the user documentation on scheduling.

[ci skip]
Implement a store/restore mechanism for resetting object states to earlier values. Not yet working for the C version of the SpikeQueue (and standalone)
Make store/restore work with the C++ version of the SpikeQueue
Throw a `NotImplementedError` when trying to use store/restore in standalone.