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-common/src/main/java/com/l2jserver/service/configuration/ConfigurationService.java

@@ -0,0 +1,39 @@
+/*
+ * 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.service.configuration;
+
+import com.l2jserver.service.Service;
+
+/**
+ * The configuration service is responsible for reading and writing in
+ * configuration storage. Each configuration is represented by an interface.
+ * Implementations of this interface are implementaion specific.
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public interface ConfigurationService extends Service {
+	/**
+	 * Get the configuration object for <tt>config</tt>
+	 * 
+	 * @param <C>
+	 *            the configuration type
+	 * @param config
+	 *            the configuration interface class
+	 * @return the configuration object
+	 */
+	<C extends Configuration> C get(Class<C> config);
+}