Dinodex

with help from @jvanderz22 and @jillalynch
There's a pattern here that I often discuss with folks on data_science. This test file relies on the specific implementation of the dinodex.csv file. I get that in general; the file is set up with a ton of dino records. Still, that file is incidental to the entity of a DinoDex (or of a Dinosaur). A better approach would be to generate data such that it is within the test file (or some similarly close location that I can see without having to switch back and forth). That way it's easier to reason about the behavior of the class.