Bug 154178 Support projectFolder in BIRT viewer
If the report supports projectFolder, the viewer also need to enhance for this feature.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
/**
	 * Create HTML render context.
	 * 
	 * @param svgFlag
	 * @param servletPath
	 * @return HTML render context from the given arguments
	 */
	private HTMLRenderContext createHTMLrenderContext( boolean svgFlag,
			String servletPath )
	{
		HTMLRenderContext renderContext = new HTMLRenderContext( );
		renderContext.setImageDirectory( imageDirectory );
		renderContext.setBaseImageURL( contextPath + imageBaseUrl );
		if ( servletPath != null && servletPath.length( ) > 0 )
		{
			renderContext.setBaseURL( this.contextPath + servletPath );
		}
		else
		{
			renderContext.setBaseURL( this.contextPath
					+ IBirtConstants.SERVLET_PATH_RUN );
		}
		renderContext.setImageDirectory( imageDirectory );
		renderContext.setSupportedImageFormats( svgFlag
				? "PNG;GIF;JPG;BMP;SVG" : "PNG;GIF;JPG;BMP" ); 
		return renderContext;
	}
	/**
	 * Create PDF render context.
	 *