Implemented getRemainingAir/setRemainingAir/getMaximumAir/setMaximumAir on LivingEntity

src/main/java/net/minecraft/server/Entity.java

@@ -62,7 +62,7 @@ public abstract class Entity {
     public int ticksLived;
     public int maxFireTicks;
     public int fireTicks;
-    protected int maxAirTicks;
+    public int maxAirTicks; // Craftbukkit: Make public
     protected boolean ab;
     public int noDamageTicks;
     public int airTicks;

src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java

@@ -96,4 +96,20 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         
         return null;
     }
+
+    public int getRemainingAir() {
+        return entity.airTicks;
+    }
+
+    public void setRemainingAir(int ticks) {
+        entity.airTicks = ticks;
+    }
+
+    public int getMaximumAir() {
+        return entity.maxAirTicks;
+    }
+
+    public void setMaximumAir(int ticks) {
+        entity.maxAirTicks = ticks;
+    }
 }