Add more example data to use in creating the documentation #92

For example:

1. 100 visits (~25 each from two clinics on two days)
2. 20 identical visits, 10 steps each (4 CFs, all the same)
3. 20 nearly identical visits, 10 steps each (one CF random)
4. 20 random visits, random lenfth (4 random CFs)