#137 - opengraph title test case
#137 - test separator
#137 - use og:title in test case
#137 - corrected title
#137 - corrected title
#137 - fetch opengraph before title
#137 - refactor title extraction based on opengraph, meta headling and title element
#137 - more explicit error message
Merge branch 'feature/title-extraction-137' into develop