* Misc: cleanup and restructure Makefile
* Misc: use dind output target in Dockerfile
* tests/e2e: ensure that the docker runner is really up before continuing
* CI: add drone
* Misc: fix image tag for e2e in Makefile
* CI/drone: add build step, step conditionals and restrict to linux platform
* CI/drone: add docs pipeline
* Misc: allow setting e2e runner timeout via Makefile arg
* CI/drone: add target platform for docs pipeline
* CI: Goodbye travis
* Misc: add drone make target to run drone CI locally
* CI/drone: add basic pipelines for k3d-tools and k3d-proxy
* remove ref event trigger
