modules['userHighlight'].highlightFirstCommenter
add a cyan highlighto to distinguish the user who started a comment tree within that comment tree
ignore 'load more comments' when searching for first comments
remember when comment threads have already been processed
find the first comment when loading more comments
when finding first commentor author class, check all the *author* classes
whoops.
Merge pull request #521 from andytuba/highlight-comment-op

modules['userHighlight'].highlightFirstCommenter