Created by: bsilverthorn
This pull request makes three changes in sequence:
- It moves the bulk of the csvstack code inside the csvkit package, so that it can be imported directly, which makes testing simpler. (And it adds a few parameters to CSVKitUtility, also to simplify testing.)
- It implements a couple of csvstack tests.
- It fixes the "--filenames" parameter to csvstack.
Ideally, all of the utilities would live primarily inside csvkit. For now, though, I've only touched csvstack, to make it easier to iron out any issues raised with this approach.