Bug 187213 Provid a writer to serialize design in document without any white space.
Add a new writer for serialize design in document without any withe space.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/XMLWriter.java
* @param outputFile
	 *            the file to write
	 * @param signature
	 *            the UTF signature
	 * @throws java.io.IOException
	 *             if write error occurs
	 */
	public XMLWriter( File outputFile, String signature )
			throws java.io.IOException
	{
		FileOutputStream stream = new FileOutputStream( outputFile );
		out = new PrintStream( stream, false, OUTPUT_ENCODING );
		init( signature );
	}
	/**
	 * Constructor.
	 * 
	 * @param outputFile
	 *            the file to write
	 * @param signature
	 *            the UTF signature
	 * @param needMarkLineNumber
	 *            control flag, whether need mark line number
	 * @throws java.io.IOException
	 *             if write error occurs
	 */
	public XMLWriter( File outputFile, String signature,
			boolean needMarkLineNumber ) throws java.io.IOException
	{
		FileOutputStream stream = new FileOutputStream( outputFile );