add Czech qm file
add 4-Lobed Lanczos interpolator (not work yet)
Merge pull request #12 from breed808/german_translation

Initial German translation
add qm file for german translations
* Fix: falling into Loading state even while playing occasionally
add Czech locale selection string
* New: 'Resize to video resolution in windowed mode when video is changed' option
* Fix: recent open list in context menu didn't work
* Fix: interpolators were inaccurate

also, all GL_QUADS are removed
* Fix: don't display system tray icon and related options when not available
separate interpolator codes from OpenGLCompat
bring back fast interpolators
remove new line in mpv log
* Fix: previous video scene was still visible when next audio is started
* Fix: current time wasn't updated on seeking in paused state
* Fix: previous video's subtitles were displayed on resized with empty subtitles
* New: 'Dropped Frames' item in playback informations

Also some cleanups are done.
* Mod: display channel layout instead of the number of channels in playback informations
* New: channel manipulation options and channel layout menu
update mpv