Updated /w/:word page to search for and show show single Word page.
Merge remote-tracking branch 'origin/security'
Merge branch 'master' of github.com:FrontRowRails/TheBeautifulDictionary
Merge branch 'single_word_pretty_url'
Added best_word_search
  -- find exact match first
  -- fall back on words beginning with spelling
Merge branch 'master' of github.com:FrontRowRails/TheBeautifulDictionary into comparisonpage