Added Weather and WeatherStorm

src/main/java/org/bukkit/entity/Weather.java

@@ -0,0 +1,9 @@
+
+package org.bukkit.entity;
+
+/**
+ * Represents a Weather related entity, such as a storm
+ */
+public interface Weather extends Entity {
+    
+}

src/main/java/org/bukkit/entity/WeatherStorm.java

@@ -0,0 +1,9 @@
+
+package org.bukkit.entity;
+
+/**
+ * Represents an instance of a weather storm entity
+ */
+public interface WeatherStorm extends Weather {
+
+}