Unit tests

[jallmer]

Somehow unit testing should be provided (e.g.: whether the deftasks work).

If scripts can be imported (see other issue), scripts can be written such that they contain only one deftask and some known input data.

This means what is missing is

1. the ability to compare expected and produced output
2. a way to bulge start multiple of such tests (e.g.: all cuneiform test files .cft?? in a directory).
3. a way to visualize the ones that failed.