Contest

* Fix logging when test fails during comparing `ofstreams`

* properly handle `empty` option for streams
* add `ignore` option for streams
* cleanup logging

* Version fix

* handle errors when files to be tested are missing

* Update file comparisons
* added `type` field; default is `text`
* supports `binary` and `image`
* binary checks byte streams, image uses `Pillow` to compare image contents (avoids checking embedded metadata)

* Add capability to run setup steps before running a test case