ical combining (extension of #31)

[JM-Lemmi]

This adds an endpoint on port 48080 /profiles/du4lcombined that combines the calendar from front and our Outlook-Admin-Calendar.

Few things I'd like to discuss:

• [x] Hardcoding the key into the config here? Seems like a bad idea and defeating the purpose of the key
• [x] can it somehow be integrated so it doesnt need its own exposed port?

But I also wanted to get a "working good enough" commit out there, so we can get the calendar up as soon as possible.