current_app logging throughout (no prints)

[tskluzac]

Given the high number of threads running on our elastic beanstalk cluster, we should have replace all print statements with current_app logging statements. This can apparently easily be done across the blueprints/application by

from flask import current_app

and then typical logger statements like

current_app.logger.info, current_app.logger.error, etc.

[tskluzac]

Resolving this will also resolve #5