[BUGFIX] Add sorting field

To display entries in the BE module in the proper order,
we need a sorting field withing a given log run.

Also added missing license file.

Resolves: #64037
Releases: 3.0
Change-Id: Ieaa99fd48e496a045aeb95cd63b16248f558a1ff
Reviewed-on: http://review.typo3.org/35636
Reviewed-by: Francois Suter <francois@typo3.org>
Tested-by: Francois Suter <francois@typo3.org>