Added 'user=' || CURRENT_USER to dblink_connect due to bug with unkown role.
Extracted get_db_connection_count from main.
Issue #59 - Added overloads for Requests::fromStream and Requests::tryReadLength with additional parameter RequestParseStatus. Added RequestParseStatus enum. Refactored processMessageFrom methods in TradingServer and LoginServer classes to use new overload of Requests::fromStream.
Removed unused getStockInfo.