Create update try time and update rate control veriables.
Update default settings. Use db session engine.
Create Stocks and Assets serializers used by rest_framework.
Create AssetsList view for serving all assets of a backtest. AssetsDateList view for serving all assets for a date of a backtest.
Add new views to urls.
Regroup update functions.
Create assetsTable control javascript.
Add asset-table into run template.
Update assets url.
Create serializer for RiskMetrics.
Create API View for serving RiskMetrics of a backtest with a date.
Add RiskMetrics api into urls.
Create risk metrics table.
Clean test codes.
Create risk metrics update scripts.
Update validator for datepicker.
Add an inline style to fix layout.
Merge pull request #20 from derek-dchu/dev

Create assets table and risk metrics table.