Bug 201847 [Regression] Italic does not work in PPT [1205]
engine/org.eclipse.birt.report.engine.emitter.ppt/src/org/eclipse/birt/report/engine/emitter/ppt/PPTWriter.java
private Map fileNamesLists = new TreeMap( );
	private Map currentImageData = new HashMap( );;
	public PPTWriter( OutputStream output )
	{
		try
		{
			writer = new PrintWriter(
					new OutputStreamWriter( output, "UTF-8" ), false );
		}
		catch ( UnsupportedEncodingException e )
		{
			assert ( false );
		}
	}
	/**
	 * Creates a PPT Document.
	 * 
	 */
	public void start( )
	{
		if ( !imageNames.isEmpty( ) )
		{
			imageNames.clear( );
		}
		if ( !fileNamesLists.isEmpty( ) )
		{
			fileNamesLists.clear( );
		}
		println( "MIME-Version: 1.0" ); 
		println( "Content-Type: multipart/related; boundary=\"___Actuate_Content_Boundary___\"" );