support for non wiki(m|p)edia hosted images; enhanced questionnaire with input fields for missing values
fixed backwards navigation (again)
Merge branch 'dummy-forms' of github.com:wmde/Lizenzverweisgenerator into dummy-forms

Conflicts:
	app/Questionnaire.js
	app/nls/NoApi.js
	app/nls/Questionnaire.js
	app/nls/de/NoApi.js
	app/nls/de/Questionnaire.js