Add adapter to openfaas

[squarism]

Scripts are not allowed because microfile is trying to push the file system event (something changed) away from the daemon. The complexity, rules or whatever lives away from the simple daemon. But then how can you do custom stuff? Push to openfaas.

Should be pretty easy, triggers are just http calls. Add any fancy config to make this nicer? Or just use the openfaas target URL? Too simple? Perfectly simple?