bg.po: translation updates by marto
GraphMultiEpg: Change zap behaviour in GMEPG

Only quit GMEPG when you zap to the current played channel. This will
lead to the effect that during normal zapping the GMEPG is not quited. It
will quit only when you select 2 x the same channel.
GraphMultiEPG: Fix for previous commit regards alternatives

The reference could be an alternative, so compare for the
alternative.
GraphMultiEPG: More fixes regards alternatives
Remove DemoPlugins

Not built, not needed, so remove them. Even as examples they fail.
Merge remote-tracking branch 'openpli/master' into last