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
out = new PrintStream( stream, false, OUTPUT_ENCODING );
		init( signature );
		markLineNumber = needMarkLineNumber;
	}
	/**
	 * Constructor.
	 * 
	 * @param os
	 *            the output stream to which the design file is written.
	 * @param signature
	 *            the UTF signature
	 * @throws IOException
	 *             if write error occurs
	 */
	public XMLWriter( OutputStream os, String signature ) throws IOException
	{
		out = new PrintStream( os, false, OUTPUT_ENCODING );
		init( signature );
	}
	
	/**
	 * Constructor.
	 * 
	 * @param os
	 *            the output stream to which the design file is written.
	 * @param signature
	 *            the UTF signature
	 * @param needMarkLineNumber 
	 * @throws IOException
	 *             if write error occurs