Simple Preprocessor

[amc-corey-cox]

We need to lay a framework for a simple per-processor. The purpose of this tool is simply to remediate know data quality issues, such as using nonsense values for missing data or enum columns with different enum batters (case, abbreviations, etc.)

This tool should be as simple and straightforward as possible. It should have a matrix of column X value = value that we can use to convert every value in a column to a different value. Eventually, this tool should be run by the data submitter before submission occurs but for now we'll use it upstream.