[win] Add ADM_coreSubtitle to nsi files
    [admVersion] Prepare for 2.6.8
    [WinInstaller] Prepare for 2.6.8
    [editor/half fps] Actually allow to half fps
    [qt/audio] Fix issue when input files has more than 4 audio tracks (thanks rickardE)
    [editor] Try to be more prudent when evaluating doubled fps
    [filter/ass] dont use alloca
    [filter/ass] hook video filter to core subtitles
    [core/sub] Try to handle multilines subtitles
    [core/sub] Almost working srt->ssa simple filter
    [coreSub] Save subtitle in ass format (incomplete)
    [coreSubitle] Simplify srt2ssa
    [py/nonreg] Test case for subtitle
    [py] Add test functions in its own file
    [gen] Fix py function code generator, still ugly