updated format for json changes
Merge pull request #10 from derek-dchu/backtest

Update models.
merging backtest_dev2 and new models from pull request with proper syntax in algorithm
added valuation ratio model
added json string formatting for algorithm, ratio blocks, improved ranking of stocks (only unique) and added ratio models
added DB master file for csv reading, and Pearson product moment correlation coefficient
added all scripts and csv files for seeding DB except for prices csv since it is too large
changed CharField to TextField for json string bc too long
App requirements for python-social-auth.
Update default settings. Move local_settings into dev settings, since we only need it for development.
Update development settings. Install python-social-auth.
Add python-social-auth into project under 'social' namespace.
Update base template.
Add default django auth app urls.
Add django-user-accounts as requirement.
Install django-user-accounts in development settings.
Add django-user-accounts urls.
Update nav bar in nav_bar template.
Add django-bootstrap3 as requirement.
Install bootstrap in dev settings.