Bug 151361 default value for reousrce folder user preference
When user does not sepecify the resourec foler user preference, can we make the current project folder (in IDE) or the current report design file's folder (in RCP) as the default value for the resource folder. This way, by default the current project folder is the resource folder where user can create their libs and images. Also please set the default user preference to be null when BIRT is freshly installed.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
return includeLibrary( SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( ), libraryHandle );
	}
	/**
	 * Returns the name for the file
	 * 
	 * @param filePath
	 *            the full path of the file
	 * @return Returns the name of the file
	 */
	public static String getSimpleFileName( String filePath )
	{
		return new File( filePath ).getName( );
	}
	/**
	 * Returns the namespace of the library for inculde
	 * 
	 * @param handle
	 *            the module handle to include the library
	 * @param libraryPath
	 *            the full path of the library file to include
	 * @return the namespace used to include, or null if the user cancels this
	 *         operator
	 */
	private static String getLibraryNamespace( ModuleHandle handle,
			String libraryPath )
	{
		String namespace = getSimpleFileName( libraryPath ).split( "\\." )[0];
		if ( handle.getLibrary( namespace ) != null )
		{