Checkpointing Support

[ncollier]

Checkpoint:

Seed:

• Pickle state - repast4py.random.default_rng
• Seed

Agents:

• Use agent's save method to save agent
• Use the canonical restore method to restore the agent

Schedule:

• Add metadata attribute to event. User provides enough data to recreate the Callable
• Recreate event using user metadata and event data (i.e., at etc.)

Spatial Projections:

• Save enough meta-data about the projection to re-create a clean empty one
• Record agent locations in the saved data

[ncollier]

Seed and Schedule support implemented in 4461a7c