Data storage formats and conventions

[jamiefolsom]

We should prefer CSV for data storage files, if feasible, since that will allow data to continue to be edited by scholars (provided they don't change columns).

It would be good if one developer were to provide (written documentation of) conventions for the scholars to follow, so that their data can be easily edited re-exported and imported into the framework site.

For each column,

• What values are valid (dates, strings, ints, etc)
• What they should contain/not
• What conventions if any should they follow re: length, punctuation, accents, spelling, abbreviations, consistency of reused values, etc.