hide emphasis markers when presenting
fix next page from within subheading
detect last slide and go to top of slide before narrow, so we do not
narrow on a subheading
add functions to jump to beginning and end of presentation
update key list and add beginning/end
mention fullscreen now builtin
update copyright
fix markdown bullets
add hide/show for cursor
document hide/show of cursor
Merge pull request #5 from fred-o/master

hide emphasis markers when presenting