nessViewer 2.4.4 available (media improvements)

This version stands for media improvements: the switch between MediaCenter and presentation is now on various user requests without visible desktop and the media presentations have a menu (only visible if cusor in menubar).

Internal all internet provider classes has been redesigned - this means less code and easier adaptions in the future.

Since various internet providers (DailyMotion, LastFM, RTL, VOX) were not working anymore the code for these providers were adapted.