Merge branch 'Harenkamp-master'

* Harenkamp-master: (26 commits)
  Adjusted position of the language change button in the single payment views
  Added style for language selection in single payment views
  Fixed ELV Errorhandling in both cases
  Completed stand alone cc form
  Added check if expiry date has the right format
  Reintroduced break points in case of failed validation
  Allowed errors to be displayed
  The year field may now contain strings of 2 numbers. e.g.15 will be interpreted as 2015
  label for
  Fixed error class
  Added PAYMILL Logo, added amount field
  Copy CSS-Styles from Paybutton
  Adjusted field size, adjusted Tooltip, adjusted Order of the Form fields, Added click and hover effects
  Visual Rework (Added color to payment selection)
  Visual Rework
  Updated lib installtion commentary and introduced the test email constant
  Removed testdata
  Changed the payment routine to use the latest lib version
  Removed public key and replaced it with the placeholder
  Updated Readme with setup paragraph
  ...
added sepa-only form