Simplify configuration for logging to console

[forman]

Is your feature request related to a problem? Please describe.

In many cases users just want simple logging output to the console or in the notebook.
Currently this takes many lines of configuration following standard Python's
configuration dictionary schema

Describe the solution you'd like

Specify simple logging output to the console using the log level as only configuration parameter, e.g, logging="INFO".
Even simpler logging=True would enable logging to console using default log level INFO.

[forman]

Closed by #67