support for popular words in article text
support for discovering the article lead image
getAttribute not always defined for DOMText

PHP Fatal error:  Call to undefined method DOMText::getAttribute() in
/home/httpd/squallstar/hhvm/vendor/scotteh/php-goose/src/Extractors/Cont
entExtractor.php on line 517
(2) getAttribute not always defined for DOMText
temporary fix for fatal error on DOMElement
better solution for DOMElement versus DOMText
one more fatal error

Argument 1 passed to
Goose\Extractors\ContentExtractor::isHighLinkDensity() must be an
instance of Goose\DOM\DOMElement, instance of DOMText given, called in
/src/Extractors/ContentExtractor.php on line 525
same as the last commit
extract words from description when there's no content
Merge pull request #5 from squallstar/master

support for popular words in article text and lead (top) image