Use math.ceil instead of math.Round

[kirillbrest123]

I think that math.ceil handles edge cases like 1-2 players a lot better than math.Round.
For example when there are 2 players you probably don't want the map vote to trigger when just 1 votes to change the map. So you either have to:
a) Set percentage of players who need to RTV to 0.75+
b) Set minimum players to enable RTVing to 3+
Both of these options can be undesirable because:
a) Players are sloths and it can be hard to get 75% to RTV when there are more people on
b) It completely blocks map changing when there are <2 players on the server, which can be frustrating
Also consider that math.ceil behaves exactly the same as if no rounding is done at all, which makes more sense for me

[plally]

Thanks for the contribution