Articles 1.6.4-pl

Merge branch 'develop' into production

* develop:
  Bump version for 1.6.4-pl
  Update getResources to 1.6.0-pl
  Fixed bug right-clicking to add new Article
  Fixing issue http://tracker.modx.com/issues/9508 Now allows users to customize date and time formats when viewing a list of articles in a container in the manager.
  Added Comment Sort Direction
  French translation
Merge branch 'develop' into production
Merge branch 'production' of github.com:modxcms/Articles into production

merging branch
Merge branch 'develop' into production
Merge branch 'develop' into production
FIxing Broken Preview URLs

Closes #9
Bumping Version, Updating changelog
Fixing Post to Twitter

Closes #16