#24 Enable LiveTv preference by default

[Flohack]

So far we see that LiveTv is already more than just "experimental", so the option to enable it explicitly could either go away or be checked as a default for new installations.

[Lomion]

Accepted! I thought this was set to default before ...

I will be online 2012-08-14 at 6 pm CET on irc.freenode.org #mythtvplayer for detailed discussions ...