BPMN.iO - Add Ludwig integration

This patch should do the job.

Thanks @devad for your contribution, but it's very unlikely that we're going to support other installation methods than composer, as that's certainly the future of building and updating Drupal sites. I don't think it's a good idea to suggest any other paths to users, not only because the automatic updates at the horizon are built on top of composer as well.

Thanks for reply @jurgenhaas. I Understand.

The patch provided here can be used by those in desperate need to use this module without Composer.