fixed position 0 bug (i.e. first annotations wouldnt be rendered if they happened to be on position 0)
marginalia follow scroll
added plugin to style barlines
disable scroll plugin in marginalia
fixed marginalia font size bug
fixed bug in interlinear positioning: superlinear additions do no influence the position of sublinear additions when they happen in sequence; sublinear additions still *do* influence superlinear ones (e.g. a caret followed by an insertion). This takes care of some annoying fringe cases, though the algorithm can probably be made more generic and based on actual positions rather than empirical assumptions. Eventually.