Re-apply the change for
https://trello.com/c/JGQ2LjvV/340-editor-of-minor-edit-not-to-show-as-last-person-to-update-a-question-on-main-question-list,
which got dropped somehow, presumably during modal merge, and re-raised
at
https://trello.com/c/zeM2dKQM/473-investigate-possible-issue-with-minor-edit.
Merge remote-tracking branch 'upstream/merge1' into merge1

Conflicts:
	askbot/models/post.py
Make PostRevisions appear in order of descending id in admin list view.
Improved logic for ordering a question's answers. Instead of adding the
initial order_by (id_FORUM_DATA_RULES__DEFAULT_ANSWER_SORT_METHOD at
settings/FORUM_DATA_RULES/) as a secondary ordering field regardless of
what the first one is (unless it's the same), choose a tie-breaking
field which is specifically appropriate for each option. This fixes our
shaky case (ordering by most voted when initial order_by is also most
voted), because now the answers are ordered by most voted and then
latest first. In each case, one of the ordering fields is a timestamp,
so there won't be any unbreakable ties.
https://trello.com/c/KRe8tNYZ/494-better-logic-for-ordering-answers
Merge pull request #308 from knowledgepoint-devs/merge1

Resurrected fix for minor edits and improved ordering of answers beneath questions, and PostRevisions in admin list view.