fixes #1847 - Problem with "Show more" link in text with HTML markup ( markdown )
                    - changed jquery.more to jquery.extender - adapted hdx_show_more plugin to use it
                    - content should is now wrapped by a div - refactored everywhere
Merge pull request #1893 from OCHA-DAP/arti-sprint-42

fixes #1847 - Problem with "Show more" link in text with HTML markup ( m...