Orchestrate services using Compose files

[rudimk]

We should create a separate stack creation function that accepts a Docker Compose file and a Rancher Compose file, and passes them on to the Rancher cluster for orchestration.

Compose files can either be passed to the library as files, in which case the library accepts a path and reads from there. We can also try and plug in the ability to read raw YAML strings as Compose files.

[rudimk]

This is proving to be slightly problematic, considering the difficulty one is facing in encoding YML content inside a JSON object. Going to keep this for later.