New plugins: color tools

[tkbd]

Thank you very much, edb!!
It works fine and Wings3D no crash.

[edb]

Thanks tkbd for the update.

I took a bit of a break lately but I'll try to find time to update the color tool again.

[micheus]

I took a bit of a break lately but I'll try to find time to update the color tool again.

Hi edb. What about making a PR of this stuff?

[edb]

Hello micheus,

I had almost forgot about this plugin. I'll see if there is anything to wrap up.

I'll try to make a PR of what I have pretty soon.