* A version tag is now available in .version (it contains the headline of the last git checking)
* Solana command-line tools are now installed
* Removed nasty workaround for pyserum event queue, since Binder didn't like it.
* Added nasty patch around pyserum bug
* OpenOrders can now provide (on-demand) the pyserum representation OpenOrdersAccount
* New context methods -unwrap_transaction_id_or_raise_exception() and random_client_id()
* Added Retrier and retry_context() function
* Added TradeExecutor and SerumImmediateTradeExecutor classes to trade on Serum