Trajectory Recorder

These are interfaces, classes and utility functions for recording trajectory data:

TrajectoryWriterRegistry	Handles registration of trajectory data writers.
StepRecord	Keeps trajectory data for one step.
EpisodeRecord	Records and keeps trajectory record data for a complete episode.
TrajectoryWriter	Interface for modules serializing the trajectory data.
TrajectoryWriterFile	Simple trajectory data writer.
SimpleTrajectoryRecordingSetup	Simple setup for trajectory data recording.
MonitoringSetup	Simple setup for environment monitoring.