QUICKFLI: remove Pristine/QUICKFLI.
PLAY: remove Pristine/PLAY.
CROP: remove Pristine/CROP.
V: move subdirectories in Pristine/V into src/V.

These were not forked in commit c0af6a41369e8dcc54eae1adc247807e5b9f7bf3.
V: remove Pristine/V.