 Merge branch 'AI2911-comment_order_improvements' into 'rails235'
 Merge branch 'AI2911-comment_order_improvements' into 'rails235'

Ai2911 Comment Order Improvements

Corrections of https://gitlab.com/noosfero/noosfero/merge_requests/90

ActionItem: http://noosfero.org/Development/ActionItem2911

 - Add an option to order comments by the newest or oldest comments.

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