Add example data

[cyrusae]

• Need easily-loaded example data containing ARPAbet (go with SPADE?)
• Write demonstrations
• Explain demonstrations

[cyrusae]

• Retrieve SPADE data in format originally used
• Add data for testing
• Reformat as needed

[cyrusae]

Breaking this issue into just data acquisition, unit testing as separate issues TBA

[cyrusae]

• Create/add examples of failing data