Added external C linkage to DllMain for being called.
Added null pointer checks.
First implementation of BrokerAccount.
First implementation of BrokerBuy.
First implementation of BrokerTrade.
First implementation of BrokerStop.
Added missing releases for primitve arrays.
First implementation fo BrokerSell.
Added BrokerCommand with empty implementation.
Added converion methods for DATE and time_t. Added debug output for date
in java. All needs to be tested.