more cleanup after move to ionic3

src/config.xml

src/src/pages/campus/campus.module.ts

src/src/pages/campus/campus.ts

src/src/pages/imprint/imprint.module.ts

src/src/pages/imprint/imprint.ts

src/src/pages/news/news.module.ts

src/src/pages/news/news.ts

src/src/pages/programme/programme.module.ts

src/src/pages/programme/programme.ts

src/src/pages/settings/settings.module.ts

src/src/pages/settings/settings.ts

src/src/pages/sponsors/sponsors.module.ts

src/src/pages/sponsors/sponsors.ts

src/src/pages/tabs/tabs.module.ts

src/src/pages/tabs/tabs.ts

src/src/pages/tours/tours.module.ts

src/src/pages/tours/tours.ts