fixed conditions syntax and cleaned up stocks to buy method a little
fixed DB helper function and made conditions more robust
vastly improved buying and selling methods by refactoring away DB calls
fixed syntax and improved buying and selling, selling contained huge bug in remove
changed covariance block, need PPMCC calculation instead for comparison, will add to calculator class
Add back __init__.py within project_core.
Add back app_name in project urls.
Update seed_db script.
Update backtest models.
Install rest_framework.
Remove templatetags from home app.
Add Celery settings into dev settings.
Create celery setting script under project.
Update __init__ under project. Import celery when Django starts.
Create base class for generating queue controller of RabbitMQ.
Create ReturnsQueue for storing backtest returns into RabbitMQ.
Create basic Celery task for handling parallel backtests.
Update import via relative import. Add id to backtest.
Create unit test for backtest.
Create test task for testing backtest.