Did some template changes.

  - field.html, field.strict.html:
    - Moved the checkbox-input into the label-tag.
    - Added a before-label class for the fields that have the label
      before the input.
  - baseinput.html:
    - Removed the required attribute, since it already had been added
      elsewhere.
  - multifield.html:
    - Added the before-label class.