Add Feedburner namespace, improve parser
Add Feedburner namespace, improve parser

songfj/picoFeed,keinkurt/picoFeed,djbshfbzehr/picoFeed,hdhoang/picoFeed,djbshfbzehr/picoFeed,emmanuelroecker/picoFeed,Chman/picoFeed,miniflux/picoFeed,MorrisJobke/picoFeed,mkresin/picoFeed,inscriptionweb/picoFeed,quasipickle/picoFeed,fguillot/picoFeed