Many site fixes and optimizations

-Fix demorgen.be
-Fix seekingalpha.com
-Fix fortune.com errors
-Fix spectator.co.uk (amp redirect)
-Fix telegraph.co.uk
-Add worldpoliticsreview.com
-Code clean up and optimization
-Avoid injecting script into unrelated sites (fixes Feedly)

Full list of changes:
https://github.com/iamadamdev/bypass-paywalls-chrome/commits/master?since=2020-05-23&until=2020-05-31