Add option to use only channel names instead of full information for livestreams

On my Raspberry Pi with OpenELEC the loading of the Livestream list took forever. So I added a option to disable loading the exact information. The downside is, that you will not see what the next lifestream will be about and when it starts, but on the other hand most of the time you know that you want to watch and when it starts. This will help to keep the waiting time at a minimum on weak hardware like the Raspberry Pi.

Added new option „Show Livestream Information“
- default value is true (same behavior as before)
- if disabled the current livestream information is not parsed from the
website, but one entry per channel is shown with the only information
beeing the channel name

Added additional improvements:
- the channel banner for the lifestream will be set to the channel logo
- translated settings options
- show inscription of the livestream instead of hardcoded string 'djsjsj'
- replace channel name found by the parser with the full channel name