Feature Request: Make log optional

[mgeerken]

In our projects we work a lot with the logs. This includes the log file as well as the stdout.
Especially this log, even only in log file, is increasing our logs heavily:

`{% for node in graph.nodes.values() -%}

{{ log(modules.datetime.datetime.now().strftime("%H:%M:%S") ~ " | macro - now processing : " ~ node.unique_id | string , info=False) }}`

I'm open for any solution like optional logs via vars, as preferred by entechlog.