Add BlockEntity tick methods

Author: MrHell228

src/main/java/org/spongepowered/api/block/entity/BlockEntity.java

@@ -67,6 +67,27 @@ public interface BlockEntity extends SerializableDataHolder.Mutable, Locatable {
      */
     void remove();
 
+    /**
+     * Returns whether this block entity can tick.
+     *
+     * @return True if this block entity can tick
+     */
+    boolean canTick();
+
+    /**
+     * Returns whether this block entity is ticking.
+     *
+     * @return True if this block entity is ticking
+     */
+    boolean isTicking();
+
+    /**
+     * Sets if this block entity will naturally tick.
+     *
+     * @param ticking The ticking state
+     */
+    void setTicking(boolean ticking);
+
     /**
      * Gets the type of {@link BlockEntity} this is.
      *