Add Zoo

[riveSunder]

Create a standardized repository for loading/storing interesting patterns.

• Standard restore/save API
• Use .npy numpy arrays to store on disk
• Notebook for interactive collection of patterns
• Room for future RLE encodings

[riveSunder]

Addressed in 5e1bf2631ca5f7dc7b0c569bdd026a639502cb41

API is store/load, zoo functionality is centered on the Librarian class.