Transplant algorithm to librawprocessor.

[rageworx]

Transplant algorithm to SRCNN Y channel ( gray ) to librawprocess as a new feature.
https://github.com/rageworx/librawprocessor

[rageworx]

librawprocessor now improving progress by using floating point calculation algorithms in background.
It will take long term to apply this feature for next release.