Create Table Definitions for all OEPS CSVs

[mradamcox]

This is the schema that we'll use: https://specs.frictionlessdata.io/table-schema

The CSVs we build these JSON files for should be the latest OEPS release. The structure of these files is not 100% defined yet, but perhaps these JSON files could be made as a preparatory step to guide the conversion.

Update

We'll actually be creating "table definition" files, a construct I've made based on the frictionless data standard linked above, but with some extra properties that we need for loading data into BigQuery (including a path to the dataset itself). See this README for more info.

[bucketteOfIvy]

I went ahead and added and wrote up a python script -- make_tables.py -- to automate the generation of the tables given the presence of a nicely formatted data dictionary. This does give rise to a few next steps. The first [and fastest] is that I need to double check that the output adheres to the Frictionless Data table-schema, but any modifications should be small. Beyond that, the data dictionaries themselves are not formatted in a way that translates nicely to the table schema, so if I have time I'll try to clean those up. Likely the biggest thing that needs done is the creation of a C_Dict.xlsx from which the county level csv files can be made.

(I forgot to tag this issue in the commit, but the change can be found at 51d87c1)

[mradamcox]

Splendid. I have received a C_dict.xlsx from @JuHe0120 so I will add that this afternoon and we can begin the final steps of bringing all the data into the same directory, etc.

[mradamcox]

Now completed.