Store data in application state in tabular form

[waxlamp]

Currently we are storing it in "CSV" form; it makes more sense to store it in "list-of-objects" tabular form since that's what is used by the Candela components. Doing the "reshaping" once when the data is loaded makes more sense than multiple times when the vis changes. Furthermore, Papaparse may be able to simply parse to the tabular form directly.