Add support of multiple environments for app. Temporary off Person tests. Test add_instance, save_instance, load_instance tasks
Refactoring and testing of common Movie methods and tasks
Refactoring of Watchlist methods and testing collection tasks for add new movies to user watchlist
Refactor app models migrations with new alembic 0.6.1
Rewrite Makefile with support of starting workers and beat processes
Fix errors in collection tasks