Update #48 - Added some features from OptiFine

sources/main/java/net/optifine/util/NumUtils.java

@@ -0,0 +1,17 @@
+package net.optifine.util;
+
+public class NumUtils {
+	public static float limit(float val, float min, float max) {
+		return val < min ? min : (val > max ? max : val);
+	}
+
+	public static int mod(int x, int y) {
+		int i = x % y;
+
+		if (i < 0) {
+			i += y;
+		}
+
+		return i;
+	}
+}