Bugfix/simple Scraper fixes

• removing html and fixing citekey from scrapingResult

• fixed scrapeReferences

• added new host and fixed scraper

• modified generic CitMgrScraper to fit more scrapers. childs were also changed overworked reference scraping from jap and aanda(regex didn t stop after references) moved tests and modified them

• fixed Iucr Scraper

• fixed faseb Scraper and tests

• fixed rsoc Scraper and tests

• fixed rspb Scraper and tests

• fixed sage Scraper and tests

• fixed sciencemag Scraper, test and added new host

• fixed mdpi Scraper and tests

• fixed nber Scraper and tests

• removed opac Scrapr and tests added hebis Scraper and tests

• added opac Scraper again, but removed it from KDEUCScraper fixed springer Scraper

• spring Scraper really fixed now

• WebUtils: changed getContentAsString to also accept post Methods added a getHeadersMethod

• fixed DOIUtils getDOIFromUrl to first decode Url and changed regex for doi fixed SpringerScraper (WorldCatScraper returns false Bibtex) to use DOINegScraper fixed SpringerLinkScraper added and fixed tests for both scrapers

• fixed apa Scraper and tests

• fixed nasaads Scraper and tests

• fixed osti Scraper and tests

• fixed plos tests and cleaned the plos scraper up

• fixed ProjectEuclidScraper and tests

• added hebis and ahajournals scraper to KDEUrlCompositeScraper

• CitMgrScraper clean up

Many scraper and testdata fixes. Some scraper fixes were more complicated (apa, nasaads, ProjectEuclidScraper), but most were straightforward. Had to adjust DOIUtils and WebUtils, but i tried to have as little side effects as possible. Also moved the testdata for each fixed scraper in its own directory.