Fix file fields on profile forms. Closes #18.
Integrate with modules to provide drag and drop field ordering.

* Integrates with the grid field extensions or sortable grid field module.
* Suggests installing the grid field extensions module.
* Closes #33.
Fix multiple instances of fields being added. Closes #37.
improved translation & added german translation

intend
Merge pull request #38 from ivoba/upstream

Improved translation and added German translation.
Added missing (empty) _config.php, SS3 now correctly detects module (i.e. for translations).
Improved translation, use translation for templates (SS3-style).
Improved German translation (typos, bad style)

(Spelled "E-Mail" according to the Duden dictionary: http://www.duden.de/rechtschreibung/E_Mail )
Ensure first and last name are different (simple spam protection)
Merge feature-differentnames, german-translation