Added documentation for 4 more functions
Added documentation for 4 more functions

Renamed "link_visible" to "relation_visible"... even though relations
are never visible, since the SVG links are the representation of
relations to the user

amosjyng/ShallWeDebate,amosjyng/ShallWeDebate,amosjyng/ShallWeDebate,amosjyng/ShallWeDebate