Changes to stream file selection

[robinp7720]

After a long discussion, it's been decided that stream file selection is not what is actually desired. This will be changed to scanning for available qualities, and exposing these qualities, rather than presenting the available files.

This will require a separate scanner to determine the quality of media files. This includes reading both file name tags such as "HDCAM", as well as retrieving the bit depth, resolution and bit rate of the media files.

After the aforementioned has been implemented, federated streaming will also be migrated to requesting a certain quality of a movie/episode, instead of requesting a single file.