Revert "Fix #53. Remove tag "time" from HTML and replace "Today" date."

This reverts commit dfc9fc7ee25b8158d5c17e88a1f906a870765af3.
Fix #53. Remove tag "time" from HTML.

The HTML used by JIRA to display the date in the changes table
for version v4.4.4 and v5.1.1 is not the same.