
This method will convert HBD to HIVE at the current_median_history price
HIVE_CONVERSION_DELAY (3.5 days) from the time it is executed. This method
depends upon there being a valid price feed.

Parameters:
    from: The account requesting conversion of its HBD i.e. "1.000 HBD"
	(type: const string &)
    amount: The amount of HBD to convert (type: const
	wallet_serializer_wrapper<hive::protocol::asset> &)
    broadcast: true if you wish to broadcast the transaction (type: bool)
