lsmashmuxer: Fix the end of an audio presentation if any samples after that presentation.
lsmashsource: Support change of video resolution.
lsmashsource: Remove inappropriate comments about licenses.
lsmashsource: Fix typo of data type.
Add LSMASHSource for VapourSynth.
Bump copyright years to 2013.
Add missing LICENSE files.
vslsmas: Rename directory name: vapoursynth -> VapourSynth.
lsmashsource: Rename directory name: Avisynth -> AviSynth.
.gitignore: more untracked file types.
vslsmas: Add 'variable' option.

The default value is 0 (i.e. false).
When the value is 1 (i.e. true), assume format, width and height are not constant.
vslsmas: Avoid access violation of getting composition duration by exceeding the number of samples.
lsmashmuxer: Shift audio timeline to avoid any negative PTS.
lsmashmuxer: Fix memory leak when getting output summary.