Fix small error in documentation - 'CHANGE_FREQUENCY_HOURLY' to 'CHANGEFREQ_HOURLY';  Otherwise following documentation leads to Undefined class constant 'CHANGE_FREQUENCY_HOURLY' error.
Fix small error in documentation - 'CHANGE_FREQUENCY_HOURLY' to 'CHANGEFREQ_HOURLY'; 
Otherwise following documentation leads to Undefined class constant 'CHANGE_FREQUENCY_HOURLY' error.
carcabot/PrestaSitemapBundle,sustmi/PrestaSitemapBundle,maximium/PrestaSitemapBundle,prestaconcept/PrestaSitemapBundle,DZunke/PrestaSitemapBundle