update avisynth.h

requires Avisynth2.6.0 / Avisynth+MT r2005 or later.

more friendly for avisynth+MT

avisynth: set filter mode as MT_NICE_FILTER automatically on avs+MT.

vapoursynth: first binary release.

0.0.3

Add missing prediction score update.
Also, fix previous frame position when n == 0.
Now, the outputs of yadifmod2 w/o edeint clip are almost same as yadif1.7 except edge part of image.

Fix wrong calculation of spatial predictions.

0.0.2

Really fix wrong calculation of spatial predictions.

0.0.1

Change default value of 'opt'.

first release

0.0.0

edit readme