Update Readme, changelog

Author: pinterf

README.md

@@ -6,9 +6,9 @@ Some routines might be slightly less efficient than original, some are faster. O
 
 This plugin is written from scratch and licensed under the [MIT license][1]. Some modes of RemoveGrain and Repair were taken from the Firesledge's Dither package.
 
-(20201215)
+v1.1 (20210104)
 - Source syntax for GCC
-- CMake build environment, builds on Linux, at least on my (pinterf) Ubuntu 18.04 WSL
+- CMake build environment, builds on Linux, at least on my (pinterf) Ubuntu 19.10 WSL
   (INTEL_INTRINSICS handling not implemented in the source, so it compiles on Intel at the moment)
 - Fix: artifacts in RemoveGrain mode 19 for 10-16 bits