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/util/BufferUtils.java

@@ -0,0 +1,63 @@
+/*
+ * 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.util;
+
+import java.util.Arrays;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+
+/**
+ * This is an Netty {@link ChannelBuffer} utility class.
+ * 
+ * @author <a href="http://www.rogiel.com">Rogiel</a>
+ */
+public class BufferUtils {
+	/**
+	 * Reads an unicode string from the buffer
+	 * 
+	 * @param buffer
+	 *            the buffer
+	 * @return the read unicode string
+	 */
+	public static final String readString(ChannelBuffer buffer) {
+		char[] str = new char[buffer.readableBytes()];
+		int index = 0;
+		char c;
+		while ((c = buffer.readChar()) != 0) {
+			str[index++] = c;
+		}
+		return String.valueOf(Arrays.copyOfRange(str, 0, index));
+	}
+
+	/**
+	 * Writes an unicode string to the buffer
+	 * 
+	 * @param buffer
+	 *            the buffer
+	 * @param str
+	 *            the string
+	 */
+	public static final void writeString(ChannelBuffer buffer, String str) {
+		if (str != null && str.length() > 0) {
+			final int len = str.length();
+			for (int i = 0; i < len; i++) {
+				buffer.writeChar(str.charAt(i));
+			}
+		}
+		buffer.writeShort(0);
+	}
+}