restructuring and including orphaned blueprints

- Restructure blueprints to be in blueprints directory and integrate orphaned blueprints from collective.blueprint.jsonmigrator.
- move pipeline configurations into own directory pipelines
- pep 8

... for a better overview.

my guess is, that this pull request doesn't break others pipelines, since the blueprints are still registered under the same name.

@buchi @jone @jean @djowett does this look ok for you?