Game updates improvements

* Added a set of tables which define game updates and their targets.
These definitions replace the old enumerate type. Added a set of
triggers which automatically create specific update tables, insert
missing entries, etc... when game update types are being manipulated.

* Removed manual insertion of game updates from empire creation
function and universe generator.

* Added registration of core update targets (i.e. planets and empires),
updated all existing game update processing functions and added type
registrations

* Created Maven project for game updates control components, moved
existing components from the -simple project, rewritten most of what
they contained, added new components for server-side update batch
processing

legacyworlds-server-data/src/main/java/com/deepclone/lw/sqld/sys/GameUpdateResult.java

@@ -0,0 +1,82 @@
+package com.deepclone.lw.sqld.sys;
+
+
+/**
+ * The result of a game update
+ * 
+ * <p>
+ * This class is used to transmit the results of the game updates processor. The results may
+ * indicate:
+ * <ul>
+ * <li>a finished game update cycle that needs no further processing,
+ * <li>an in-progress update cycle for which further in-base processing is needed,
+ * <li>an in-progress update cycle where some processing must be done in the server.
+ * </ul>
+ * 
+ * @author <a href="mailto:tseeker@legacyworlds.com">E. Benoît</a>
+ */
+public class GameUpdateResult
+{
+
+	/** Whether the update cycle is finished */
+	private final boolean finished;
+
+	/**
+	 * Name of the type of processing that needs to be run on the server, or <code>null</code> if
+	 * the update is finished or was processed in-base
+	 */
+	private final String localExecution;
+
+
+	/**
+	 * Initialise a "finished" game update result
+	 * 
+	 * <p>
+	 * This constructor will set {@link #finished} to <code>true</code> and {@link #localExecution}
+	 * to <code>null</code>.
+	 */
+	public GameUpdateResult( )
+	{
+		this.finished = true;
+		this.localExecution = null;
+	}
+
+
+	/**
+	 * Initialise an "incomplete" game update result
+	 * 
+	 * <p>
+	 * This constructor will set {@link #finished} to <code>false</code> and {@link #localExecution}
+	 * to the parameter's value.
+	 * 
+	 * @param localExecution
+	 *            the name of the type of processing to be executed on the server, or
+	 *            <code>null</code> if the update was processed in-base.
+	 */
+	public GameUpdateResult( String localExecution )
+	{
+		this.finished = false;
+		this.localExecution = localExecution;
+	}
+
+
+	/**
+	 * @return <code>true</code> if the update cycle was completed or <code>false</code> if further
+	 *         processing is required.
+	 */
+	public boolean isFinished( )
+	{
+		return this.finished;
+	}
+
+
+	/**
+	 * @return Name of the type of processing that needs to be run on the server, or
+	 *         <code>null</code> if the update is finished or was processed in-base
+	 */
+	public String getLocalExecution( )
+	{
+		return this.localExecution;
+	}
+
+}