Node Activity Report

Node activity report allows to track node related activities on the site - create, update and delete. For each of these activities the activity type, timestamp and user ID of the user are stored. Includes reports by user and time period.
One can achieve similar results by using combination of Views and watchdog entries but this solution will provide incorrect results as watchdog entries get flushed at a regular interval.

@todo Cleaning up node_activity records either manually and/or at scheduled internals.