showParent selects ".comment .buttons a[href^=#]" for comment parent button. Should be more robust long-term.
showParent - cleanup: just use jQuery             not the superfluous helper function
showParent hides parent comment via reference to  div created in show.  nixed the superfluous helper functions.
showParent bgFix code cleanup for readability
Merge pull request #250 from andytuba/showparent-fix

showParent fixed with better selector