Reimplement flowing subs correction

[vevv]

Some providers use terrible flowing subtitles, probably converted from NA broadcast captions. Previous attempt was highly imperfect and corrupted some otherwise good subs, so it has been removed in 94e2b96c.

Example:

Original (WebVTT)

00:00:12.812 --> 00:00:13.079 line:84% align:center
(Audience laughter)             
>> Okay, I                      

00:00:13.079 --> 00:00:13.346 line:84% align:center
(Audience laughter)             
>> Okay, I found one of ou      

00:00:13.346 --> 00:00:13.613 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:13.613 --> 00:00:13.880 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:13.880 --> 00:00:14.147 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:14.147 --> 00:00:14.414 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:14.414 --> 00:00:14.681 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:14.681 --> 00:00:14.948 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:14.948 --> 00:00:15.215 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:15.215 --> 00:00:15.482 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:15.482 --> 00:00:15.749 line:84% align:center
(Audience laughter)             
>> Okay, I found one of our     

00:00:15.749 --> 00:00:16.016 line:84% align:center
>> Okay, I found one of our     
bags.                           

00:00:16.016 --> 00:00:16.282 line:84% align:center
>> Okay, I found one of our     
bags.                           

00:00:16.282 --> 00:00:16.549 line:84% align:center
>> Okay, I found one of our     
bags.                           

00:00:16.549 --> 00:00:16.816 line:84% align:center
>> Okay, I found one of our     
bags.                           

00:00:16.816 --> 00:00:17.083 line:84% align:center
bags.                           
>> Oh, that'                    

00:00:17.083 --> 00:00:17.350 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:17.350 --> 00:00:17.617 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:17.617 --> 00:00:17.884 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:17.884 --> 00:00:18.151 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:18.151 --> 00:00:18.418 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:18.418 --> 00:00:18.685 line:84% align:center
bags.                           
>> Oh, that's not ours.         

00:00:18.685 --> 00:00:18.952 line:84% align:center
>> Oh, that's not ours.         

00:00:18.952 --> 00:00:19.219 line:84% align:center
>> Oh, that's not ours.         
>> Sorry.                       

00:00:19.219 --> 00:00:19.486 line:84% align:center
>> Oh, that's not ours.         
>> Sorry.                       

00:00:19.486 --> 00:00:19.753 line:84% align:center
>> Oh, that's not ours.         
>> Sorry.                       

Old subby clean up attempt

6
00:00:12,812 --> 00:00:15,749
(Audience laughter)
Okay, I found one of our

7
00:00:15,749 --> 00:00:16,816
Okay, I found one of our bags.

8
00:00:16,816 --> 00:00:18,685
bags.
Oh, that's not ours.

9
00:00:18,685 --> 00:00:19,753
Oh, that's not ours. Sorry.