New Release 1.5.3 available

[dgud]

Nemyax there is only so much I can do, opencl variant is not as exact as the real smooth, which is why it is not used as the real command. I need to do some approximations to be able to speed up the otherwise it will be slower than the original.

Regarding the speedup we have changed to a new erlang version, so maybe some of my workmates have done something good, they get lucky sometimes :-)