Merge remote branch 'aaronw/bug608_checkbox_labels'

* aaronw/bug608_checkbox_labels:
  No need to translate label name.
  Add label tag to fix translation issue.
  Update english translation file.
  Checkbox label is being translated in the form definition -- translating it in the template is redundant and breaks <label> functionality.

Conflicts:
	mediagoblin/i18n/en/LC_MESSAGES/mediagoblin.po