Modularizes the Maven project

This commit modularizes the maven project into several modules:
 - l2jserver2-common: common sources for both login and gameserver
 - l2jserver2-gameserver: the game server
 - l2jserver2-loginserver: the login server
 - l2jserver2-tools: refactored src/tools/java soure folder

l2jserver2-gameserver/src/main/java/com/l2jserver/model/dao/PetDAO.java

@@ -0,0 +1,30 @@
+/*
+ * This file is part of l2jserver <l2jserver.com>.
+ *
+ * l2jserver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * l2jserver is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with l2jserver.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.l2jserver.model.dao;
+
+import com.l2jserver.model.id.object.PetID;
+import com.l2jserver.model.world.Pet;
+import com.l2jserver.service.cache.Cacheable;
+import com.l2jserver.service.database.DataAccessObject;
+
+/**
+ * The {@link PetDAO} is can load and save {@link Pet pet instances}.
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public interface PetDAO extends DataAccessObject<Pet, PetID>, Cacheable {
+}