Release Name: 0.14.2

Notes: ## kramdown 0.14.2 released This release adds the possibility to pre-define link definitions via the new option `link_defs`. Apart from that one bug was fixed. It is recommened to update to this version. On a side note the kramdown homepage has been updated to show a menu of the available documentation pages when viewing a documentation page. And a documentation page showing all available options has been added. ## Changes * 1 minor change - New option `link_defs` for pre-defining link definitions * 1 bug fix - Fixed raised errors on atx headers without text