Log Message:
Update ruby-columnize to 0.9.0.

0.9.0 Dec 5, 2014  - Early gecko

0.8.9 Apr 19, 2014
- Add columnize method to Array class and a place to set its default options
- Add option :colfmt to allow a format specifier to use (e.g. '%02d')
  in stringifying
  list items
- Add option linesuffix (default is "\n")
- When using arrange_array each line now has trailing ","