Workflows

[lbrndnr]

This branch implements basic support for workflow executions on all platforms
To do:

• Support for local workflow execution
• Workflow caching

[lbrndnr]

@mcopik finally managed to lint the source code correctly. Didn't implement the local workflow deployment, as discussed. Have a look and let me know what you think :)
Ah note that the current implementation does not automatically setup a redis host, I figured this was too cumbersome. Shall I add an installation note on the redis requirements in order for the workflow experiments to work?

[lbrndnr]

I have added documentations on the workflow definition as well as the redis installation.