Added Mark The Words as a preloaded dependency.
Added support for more content types to be displayed as buttons.
Merge branch 'master' into markTheWords
Merge branch 'markTheWords'
Merge branch 'master' into more-buttons
Merge branch 'more-buttons'
Merge branch 'go-to-slide' of github.com:h5p/h5p-editor-course-presentation into go-to-slide
Resolve conflicts