New (template) wrapper function fixEmptyContentToDashes() introduced, EL rewrites:

- New (template) wrapper function fixEmptyContentToDashes() introduced, this
  function should help template writers to deal with empty content. If an empty
  string is detected, it got converted into three dashes. This may fix some
  issues with empty div and/or td tags.
- Even more rewrites to make use of EL
- TODOs.txt updated