* Add PolygonDataQueueHandler
* Add history provider and downloader for Polygon
* Add aggregator to PolygonDataQueueHandler
* Address review
- Removed duplication in message classes
- Added public Subscribe/Unsubscribe methods in PolygonWebSocketClientWrapper
- Added history requests for Forex and Crypto
* Address review
- Add security type and market arguments to downloader
- Fix time zone bug in downloader
* Remove unnecessary locks
* Add Polygon history for all resolutions
- Equity: trades and quotes
- Forex: quotes only
- Crypto: trades only
Stefano Raggi