TV articles change

- Removed obsolete article about TV Emulator (new one is published already),
- Extended article with info about supported adaptive bitrate streaming and drm formats in the TV Store,
"Opera TV Store aims to unify those at devices it runs to reduce fragmentation. Please not that not all devices TV Store runs at support them though."

What does this mean? What does the Opera TV Store offer here to make supporting these different formats easier? Do we need this bit.