refactored scraping of cases

& fixed scraping of cases where data is merged in one h2-element
The test case here was the journal article: www.jurpc.de/jurpc/show?id=20110132 where
<blockquote>"pages": "Abs. 1 - 92",</blockquote>
It was there before, it is just rearranged. But the information is not how typically page infomation from a journalArticle looks like. I browsed trough the journal a little and here are my observations:
 * every journal article has new number, e.g. 132
 * every article has a doi
 * there are no page numbers on the webpage
 * there is a page number in the metadata from the doi (page 19-19)
 * the paragraphs (Absätze = Abs.) are numbered for easier referencing