Add stats layout

[andschneider]

The stats layout is a little complicated. I'm not sure exactly what stats to display yet, but will likely just mirror what can be found on MLB's website. I believe the endpoint is https://statsapi.mlb.com/api/v1/stats. The problem is you need query parameters to get back data. These come from the meta endpoints:

• https://statsapi.mlb.com/api/v1/statTypes
• https://statsapi.mlb.com/api/v1/statGroups

I've managed to build this query: https://statsapi.mlb.com/api/v1/stats?group=hitting&stats=sabermetrics,byDayOfWeek but more exploration is needed around the query parameters.

The UI will be based on a Table widget. I would like to add the ability to perform searches, e.g. batting vs pitching. These searches will likely correspond with what I discover with the API.