Changed OpenTK dependency.
Fixed broken versioning.
Fixed warnings.
Merge branch 'master' of https://github.com/imintsystems/Kean
Improved formatting and removed obsolete method call.
Merge branch 'master' of https://github.com/imintsystems/Kean
Improved colors and distance measurement for Bgr and Bgra raster images.
Fixed errors in distance measurement.
Improved Bgr and Bgra raster image distance measurement.
Corrected a few things in Uyvy.cs.
Added nuget version requirement.
Merge branch 'master' of https://github.com/imintsystems/Kean
Merge branch 'master' of https://github.com/imintsystems/Kean
Merge branch 'master' of https://github.com/imintsystems/Kean
Improved color handling and differences.
Merge branch 'master' of https://github.com/imintsystems/Kean
Fixed last raster tests.
Improved raster image distance measurement.
Removed Cairo Bgr since it does not work anyhow.
Fixed dependency.