Mailer project continued (heavy refactoring):

Mailer project continued (heavy refactoring):
- Added all missing nodes in all XML templates to allow $content being handled
  by referred HTML templates
- This means that you can pass "dynamic" content through the XML sub system to
  the templates as usual. If you do so, a generic 'rows' array element is being
  used for the row output
- Refactured all form-tags to EL code to allow e.g. adding session id to all
  forms or (not yet added) TAN numbers to combat any kind of form spamming and
  accidentally done re-submits
- Including closing form tag
- In the above process, onsubmit/onreset are now strongly discouraged as you
  should better use the jQuery AJAX framework
- Other rewrites/refacturings I cannot remember
- TODOs.txt updated