Hello,

this is revised patch, this is the first part that just updates to the
API v4 of VapourSynth.

Changes in API v4:
-All functions previously in header are now part of the "vssapi" object
-Renames of different types and functions
-YCoCg is not treated as different format to YUV anymore
-Some pointers to arrays are now arrays inside a struct.

Best regards
Stefan