Fix bug that prevented cpp player to play when there was a team with …

…a space in their name... what an embarrassing bug...

main.cpp

@@ -9,7 +9,7 @@ int main(int argc, char* argv[])
 {
     string action = argv[1];
     string game_state_json;
-    cin >> game_state_json;
+    getline(cin, game_state_json);
 
     json::Value game_state = json::Deserialize(game_state_json);