More os_news date field updates.  #1412

Fixed sv list to show all news, not just news newer than today.
Several field changes on node/edit:
 - Moved between title, body
 - Required
 - Defaults to now.
 - Stored as timestamp
View uses new field for sorting.
Node view shows this date where the created date used to be
Added update hook to copy node created dates into this field, so old news will still work

Todo: test against prod data.  Need to be sure field adds and update hook runs without issue.
Merge branch 'SCHOLAR-3.x' of github.com:openscholar/openscholar into SCHOLAR-3.x