cosmetics in cs.po

Signed-off-by: pieterg <pieterg@users.sourceforge.net>
Updates for show single frame.

- allow h264 still images to be shown (based on showiframe patch from
  Erik slagter)
- vusolo2 (and probably dus2 too) did not properly show single
  iframes in enigma2 with drivers from before 2013. This was very
  noticable when in radio mode.
fix typo in decoder.cpp

Thanks IMS
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.
MovieSelection: Fix some whitespaxes
MovieSelection: Add option to hide known extensions

And remove some more white spaces
MovieSelection: Better description an simpler coding
UsageConfig: Latvian should be lav instead of lat

Thanks Artis

See: http://openpli.org/forums/topic/21339-automatic-language-subtitle-settings-improvements/page__st__40
configure.ac: simplify vu+ boxtype detection
MovieList: Add pictures to the known extensions

And do it slightly different - thanks DeBeek
MovieSelection: Remove delayTimer use callLater instead

As callLater does in fact the same
MovieSelection: Remove extension code/data duplication and speed it up

Put the "known extension types" lists in one spot for easy maintenance.

Doing "a in (very,big,tuple)" will sequentially scan all elements of
the tuple. This is much slower than a set or frozenset which uses a
hash lookup.
InfoBarGenerics: Some tiny timeshift related fixes

Fixed when going to MovieSelection and directly exit that timeshift
could be started, but not played anymore.
Remove PVRState when zapping/selecting different service that also
stops the timeshift.

I still discover some strange things in case the timeshift buffer
does not have much time yet (< 1 min) and we step skip back. This
is not fixed (yet)
InfoBarGenerics: Some cosmetic cleanups regards Timeshift

Use True and False instead of 0, 1 and False mixed up together
for timeshift_enabled and remove not used declared timeshift_state
InfoBarGenerics: Ensure timeshift is stopped when zap
InfoBarGenerics: set seekstate to play when not seekable in timeshift

Thanks ims and also ensure to stop when zap was not a good idea...