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/utility/ParameterAccessor.java
Locale locale = null;
		
		locale = getLocaleFromString( getParameter( request, PARAM_LOCALE ) );
		
		if ( locale == null )
			locale = request.getLocale( );
		
		if ( locale == null )
			locale = webAppLocale;
		return locale;
	}
	/**
	 * Check whether the viewer is set rtl option.
	 * 
	 * @param request
	 * @return
	 */
	public static boolean isRtl( HttpServletRequest request )
	{
		boolean isRtl = false;
		if ( "true".equalsIgnoreCase( getParameter( request, PARAM_RTL ) ) ) 
		{
			isRtl = true;
		}
		return isRtl;
	}
	/**
	 * Get report locale from a given string.
	 * 
	 * @param locale