chore(grunt): files in assets are possible

-- update copy-task with the new type
chore(components): changed the order of items in side-nav
feat(files): file-folder in assets
feat(imprint): added imprint-page
chore(headings): h3 next h2 gets lower space
chore(): update link-colors
chore(navigations): correct element for active-styling
chore(templates): added paths for views in links
chore(dist): update