void Engine::load(const std::string& file)
{
	if(state)delete state; state=0;
	state=new State();

	//if we provide a file load it in first
	if(!file.empty())
	{
		std::ifstream is(file,std::ios::binary|std::ios::in);
		if(is.is_open())serializer->readState(is,state);
	}

	//grab expansions and load them in next
	ExpansionLocator::ExpansionSet expansions=expansionLocator->locate();
	ExpansionLocator::ExpansionSet::iterator eit=expansions.begin();
	while(eit!=expansions.end())
	{
		Expansion* exp=*eit;
		std::ifstream is(exp->getExpansionFile(),std::ios::binary|std::ios::in);
		if(is.is_open())serializer->readState(is,state);
		++eit;
	}
}