Broken Links and missing data

[sudochris]

Due to the move of the fh-dortmund.de domain several issues exists in this repository:

1. Images are missing (404)
   e.g. http://www.fh-dortmund.de/spicher/screenshots/v0.2-beta/screenshot_1.png

2. Data is missing ("Unspecified share exception" from sciebo)
   e.g. https://fh-dortmund.sciebo.de/index.php/s/HtU70L5jz73wOJd/download

3. Contact information (404)
   e.g. http://fh-dortmund.de/spicher