header dynamic first step
conditional statement ie8 supports header
header footer rework
Merge branch 'develop' into APD-4

Conflicts:
	grails-app/controllers/de/apd/IndexController.groovy
User story prepared for review
refinement
refinements
Merge branch 'APD-4' into develop

Conflicts:
	grails-app/i18n/messages.properties
	web-app/css/apd.css
vendor folder refactoring