Added login_required to handlers and fixed some bugs with login
Fixed return render_template() to return properly 404 if page does not exist
Deleted app/server.py
Simplified logic. There is no need for modules to subclass Crawler Class anymore
Simplified logic of crawler. Crawler loads modules by polling 'crawlers' directory. No need for external libraries like pyinotify and watchdog
Modified start_celery.sh in order to start properly
Added a script to start crawler
Added a page for viewing users
Removed unecessary code from settings.py
Added celery to app/__init__.py