Rework color printing to use color logging

[jpl-jengelke]

See https://stackoverflow.com/q/384076/325452

and

EXOTIC/exotic/exotic.py

Line 153 in e49f4eb

def log_info(string, warn=False, error=False):

Explanation: Ideally, the logging will split to a console appender and a file appender. The console appender will use a custom formatter that uses colors and adapts colors to the several platforms that execute EXOTIC. The file appender will use the default formatter that is test-only.