Concoursekit

- Fixed a bug where negated environments were working for some pipelines but not all when setting all
- Test added

- the `ENVIRONMENT` environment can now be used with `pipeline_suffix` and `concourse_target`.
- Planning Headers no longer include suffix, but suffix is still shown for each pipeline generated from the base name.
- running `--test-pipeline` with `--all` will no longer cause an exception.

- Negated environments will no longer cause exceptions if the negated environment is present as a subdirectory for some environments but not others.
- Added the ability the declare environments which should be negated by default under the key `ignore_environments: []`

Add The ability to negate environments when setting pipelines.

Adds missing dependencies.

This one should actually work...