Additional information displayed

Added display information on the play screen (the stream quality), as well as a list of available streams on the video information pages, as demanded in feature request #134 
Problem is at line 1999, the size of the bar is not dynamically adjusted to the length of the information displayed before. I don't have access to the length of this text in the "make_status_line" function, however, so a quick fix would be to replace 50 by 54, which happens be sufficient. Does it seem ok?