Octobot-trading

Updated
- [Orders] Order total
Fixes
- [Contracts] Fix inverse contracts issues

Added
- [Trading mode] Scripted trading mode system
- [Orders] Chained orders
- [Portfolio] Historical portfolio values
- [Signals] Trading signals

Fixed
- [PricesManager] Fix mark price float issue

Added
- [Asset] Add restore state when raising PortfolioNegativeError
- [Position] Add get_margin_from_size and get_size_from_margin

Fixed
- [ExchangePersonalData] Deduct funding fee from the position margin when no sufficient available balance

Added
- [Exchange] hollaex support
- [MarkPrice] Decimal conversion
- [FutureCCXTExchange] is_linear_pair and is_inverse_pair
- [FutureExchange] contract initialization
- [FutureContract] maintenance_margin_rate
- [FutureExchange] position mode parsing
- [FutureExchange] is_inverse, is_linear and is_futures
- [PositionsManager] both position side in position id
- [FutureContract] `__str__`
- [PositionsManager] get_symbol_positions with None symbol
- [API] positions
- [CCXTExchanges] get_default_type
- [Position] initial_margin and fee_to_close in _update
- [Trader] close position, set_margin_type, set_leverage and set_position_mode
- [MarginContract] check_leverage_update
- [Transaction] class
- [TransactionsManager] class
- [TransactionsManager] factory
- [TransactionsManager] transfer, blockchain, fee and realised_pnl

Fixed
- [Positions] missing mark_price fetching
- [Positions] Prevent negative margin
- [LinearPosition] liquidation price calculation
- [Position] liquidation PNL total impact
- [FuturePortfolio] order available decreasing size release

Removed
- [FutureExchange] "open" position references
- [Portfolio] inheritance
- [Portfolio] unused async

Added
- [CryptofeedWebsocketConnector] future index feed
- [CryptofeedWebsocketConnector] sandbox support
- [FutureExchangeSimulator] default leverage and margin_type values
- [Future][Exchange] get_contract_type
- [Contracts] MarginContract
- [Portfolio] Asset class
- [Portfolio] spot, margin and future assets
- [Portfolio] create_currency_asset
- [MarginAsset] implementation
- [FutureAsset] implementation
- [FundingManager] predicted_funding_rate
- [FundingChannel] predicted_funding_rate
- [Position] LiquidationState creation when liquidation detected
- [Position] size attribute from quantity
- [Positions] InversePosition and LinearPosition (from cross and isolated)
- [Position] Notional value update
- [LiquidatePositionState] terminate implementation
- [MarginContract] set_current_leverage
- [FutureContract] PositionMode
- [FutureExchange] PositionMode
- [FuturePortfolio] update_portfolio_from_liquidated_position
- [Position] close method
- [Order] get_position_side
- [Positions] multiple position per symbol support
- [FutureContract] is_one_way_position_mode
- [ExchangePersonalData] reduce only and close position when filling order
- [PositionsManager] get_order_position
- [Position] get_quantity_to_close and get_update_quantity_from_order
- [Position] close when size after update is ZERO
- [Position] InvalidOperation catching
- [Asset] _ensure_not_negative
- [Position] on_pnl_update
- [ExchangePersonalData] handle_portfolio_update_from_funding

Updated
- FutureContract Moved to exchange_data
- Moved Asset methods to SpotAsset
- [MarginContract] Made margin_type and current_leverage writable
- [Portfolio] Migrated to assets
- [Portfolio] Migrated to get_currency_portfolio

Fixed
- [ExchangeSymbolData] FundingManager when future

Removed
- [Order] get_currency_and_market