Update #48 - Added some features from OptiFine

sources/main/java/net/optifine/config/RangeInt.java

@@ -0,0 +1,27 @@
+package net.optifine.config;
+
+public class RangeInt {
+	private int min;
+	private int max;
+
+	public RangeInt(int min, int max) {
+		this.min = Math.min(min, max);
+		this.max = Math.max(min, max);
+	}
+
+	public boolean isInRange(int val) {
+		return val < this.min ? false : val <= this.max;
+	}
+
+	public int getMin() {
+		return this.min;
+	}
+
+	public int getMax() {
+		return this.max;
+	}
+
+	public String toString() {
+		return "min: " + this.min + ", max: " + this.max;
+	}
+}