Internal refactoring  - cleaned up reuestMatchesAndFriends

Added private selectors
+(NSSet *)SH_collectPlayerIdsFromAttributeForMatches:(NSDictionary *)theMatchAttributes attributeForFriends:(NSDictionary *)theFriendAttributes;
+
+(NSOrderedSet *)SH_filterOutFriendsFromPlayers:(NSOrderedSet *)theSetOfPlayers withFriendIds:(NSOrderedSet *)theSetOfFriendIds;
Dispatch async on main after all requests.