Use first image from article top_node
Check image requirements before set
Initialize images and top_mage
Include meta image url to images collection
Resolve relative image urls
Fix for stopwords - wrongly checks bytestring vs unicode set
Example: http://top.rbc.ru/economics/04/02/2014/903127.shtml
Merge pull request #35 from otemnov/original

Use first image from article top_node