Build transforms once per job instead of once per block. It saves man…

…y transform creations but also the memory allocations in the trasnforms. It works because transforms do not retain any state between calls to forward()/inverse().

v2/entropy/RiceGolombCodec.go

@@ -111,7 +111,7 @@ type RiceGolombDecoder struct {
 	bitstream kanzi.InputBitStream
 }
 
-// NewRiceGolombDecoder creates a new instance of ExpGolombDecoder
+// NewRiceGolombDecoder creates a new instance of RiceGolombDecoder
 // If sgn is true, values from the bitstream will be decoded as signed (int8)
 func NewRiceGolombDecoder(bs kanzi.InputBitStream, sgn bool, logBase uint) (*RiceGolombDecoder, error) {
 	if bs == nil {