WIP: Feature/234 continuous delivery

This is a work in progress merge request for continuous delivery.

After removing the university scene and tests & demos subdirectories we can create a package that is uploaded to bintray and is downloadable via conan install phx/17.12.0@RWTH-VR/stable -r rwth-vr--bintray.

This is work in progress as there are still some warnings to fix and it's not tested well.

One question: Shall we do the update via a nightly build?