make the data extensible

[JohnRDOrazio]

Currently, ORP specific data is built into the base JSON files. This data should be abstracted out into a separate file, and joined onto the base file. This way anyone else could use the same base file without having to deal with ORP specific data.

Also, the base JSON data file only has saints from the universal calendar. The project should be able to extend this data in such a manner that requests could target a specific subset of extended data, for example with saints that are venerated in national / language edition Roman Missals... Or perhaps with various Jubilee years for major shrines around the world... Or with birth anniversaries for saints (we currently only deal with death aka "birth to heaven").