Bug 152834 support HTML description of the template
The template descrition is a fragment of HTML, use that fragment to render the template in HTML.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/presentation/LocalizedContentVisitor.java
"unsupported image type:{0}", output ); 
				}
				IImageContent imageObj = reportContent.createImageContent( content );
				imageObj.setParent( content.getParent( ) );
				
				imageObj.setImageSource( IImageContent.IMAGE_EXPRESSION );
				imageObj.setData( imageContent );
				imageObj.setImageMap( imageMap );
				imageObj.setMIMEType( imageMIMEType );
				imageObj.setAltText( content.getAltText( ) );
				imageObj.setAltTextKey( content.getAltTextKey( ) );
				processImage( imageObj );
				return imageObj;
			case IReportItemPresentation.OUTPUT_AS_CUSTOM :
				IDataContent dataObj = reportContent.createDataContent( content );
				dataObj.setValue( output );
				processData( dataObj );
				return dataObj;
			case IReportItemPresentation.OUTPUT_AS_HTML_TEXT :
				content.setRawType( IForeignContent.HTML_TYPE );
				content.setRawValue( output.toString( ) );
				return content;
			case IReportItemPresentation.OUTPUT_AS_TEXT :
				ITextContent textObj = reportContent.createTextContent( );
				textObj.setText( output.toString( ) );
				return textObj;
				
			default :
				assert false;
				logger.log( Level.WARNING, "unsupported output format:{0}",