Features
* Add `mrp_prod_vector` to apply modified Rodrigues parameters to a vector
* Add alias `rot_log_from_compact_axis_angle` for `cross_product_matrix`
* Add alias `check_rot_log` for `check_skew_symmetric_matrix`
* Add `batch_rotations.norm_axis_angles`
* Add `batch_rotations.axis_angles_from_quaternions`
* Add `trajectories.concat_many_to_many`
* Add `trajectories.concat_dynamic`
* Add `trajectories.screw_parameters_from_dual_quaternions`
* Add `trajectories.dual_quaternions_from_screw_parameters`
* Add `trajectories.dual_quaternions_power`
* Add `trajectories.dual_quaternions_sclerp`
* Add `trajectories.batch_dq_q_conj`
* Vectorize `TimeVaryingTransform.as_matrix` and `TemporalTransformManager.current_time` to enable querying transformations for multiple times at once (https://github.com/dfki-ric/pytransform3d/pull/301)
Bugfixes
* Fix `mrp_double` for no rotation (`np.zeros(3)`)