Merge branch 'walk-forward-trendline-breakout' into develop

Merge branch 'feature/backtrader_introduction' into develop

Merge branch 'feature/backtrader_indicator' into develop

[clean] Merge everything

[feat] forex trading sessions

[feat] backtrader - first test

[feat] first_strategy - fixed criteria implementation + plotting

[feat] first_strategy - implemented backtest and criteria.BreakOfRecentExtreme

[feat] first_strategy - Low/High is now Extreme - resets CriteriaManager after first invalid extreme

[feat] first_strategy - Simple strategy implementation with one criterion to check - no trade

[feat] first_strategy - Implemented automatic registration of indicators used in strategies' criteria

[feat] first_strategy - Updated example_strategy.py for last changes

[feat] first_strategy - Decoupled indicator from Data and adjusted DirectionalChange

[feat] first_strategy - Threaded streaming of MT5 tick data

[feat] first_strategy - Partial implemantaion of DataStream and run_live for event based trading