akzi/Romi

c++ actor

# Romi
c++ actor 
```
struct user:romi::actor
{
user(bool val)
{
	val_ = val;
}
void init()
{
	receivce([&](const romi::addr &from, const std::string & data) {
		msgs_++;
	});
}

bool val_;
};

romi::engine engine;
engine.start();

std::vector<romi::addr> addrs;

for (size_t i = 0; i < 3; i++)
{
	addrs.push_back(engine.spawn<user>(false));
}
std::thread([&] {
	for (size_t i = 0; i < 1000000000; i++)
	{
		for (auto &itr : addrs)
			engine.send(itr, itr, std::string("msg"));
		std::this_thread::yield();
	}
}).detach();

std::thread([&] {
	for (size_t i = 0; i < 1000000000; i++)
	{
		for (auto &itr : addrs)
			engine.send(itr, itr, std::string("msg"));
		std::this_thread::yield();
	}
}).detach();
```