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/writer/IndentableXMLWriter.java
* Writes long text to the output.
	 * 
	 * @param text
	 *            the text to write
	 */
	protected void indentLongText( String text )
	{
		assert text != null;
		assert text.length( ) >= MAX_CHARS_PER_LINE;
		closeTextTag( );
		String curTabs = getCurElementIndent( ).concat( TAB );
		literal( LINE_SEPARATOR + curTabs );
		
		int len = text.length( );
		for ( int i = 0; i < len; i++ )
		{
			char c = text.charAt( i );
			if ( c == '&' )
				literal( "&amp;" );  
			else if ( c == '<' )
				literal( "&lt;" );  
			else
				literal( Character.toString( c ) );
			
			if ( ( i + 1 != len ) && ( i + 1 ) % MAX_CHARS_PER_LINE == 0 )
				literal( LINE_SEPARATOR + curTabs );
		}
		literal( LINE_SEPARATOR + getCurElementIndent( ) );
	}
}