Function Crumple for vctrans vapoursynth Plugin

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Crumple

The transition from Clip A to Clip B occurs as either B emerges while A gets crumpled or B is uncrumpled covering up A. In place of crumpling folding can be also opted

## trans.Crumple(clip, clipb clip[, float overlap = 1.0 ][,int crumple = 1][,int emerge = 1])

Parameter description:
clip : A clip. Constant format.
clipb : B clip. Must have identical format of A clip
overlap : transition time length in seconds. Floating point. Must correspond to at least 8 frames
crumple : if set to 1 crumpling . If 0 folding.
emerge : if 1: B emerges from within A. If 0: A disappears within B
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