* Deletes NullAlphaHandler, NullLeanManager, NullSynchronizer
* Calculate the backtest and live PointInTimePortfolios only once now
* Refactor Metrics calculations
* Add missing license headers to some files
* Reverts accessibility of AddToUserDefinedAlgorithm to private
* Other misc. fixes and cleanup
* Can handle null Result packets
* Created utility files
* Added various helper methods to PortfolioLooper
* Fixes build issue by removing System.Collections.Immutable
* Updates plots to show "Insufficient data" when it can't be created
* Hides empty crisis page
* Fixes wkhtmltopdf display bug
* Removes Calculations.cs
* Modifies accessibility of AddToUserDefinedUniverse in QCAlgorithm
* Add null value handling in OrderJsonConverter
* Various bug fixes
* Fixes broken ReportChartTests.py
* Adds leverage to PointInTimePortfolio
Gerardo Salazar