[ELPA] New package: colorful-mode

[Elijah G]

Hello, I want to submit the package colorful-mode to GNU ELPA.

Colorful is a minor mode that allows preview of any color format such
as color hex and color names in the current buffer in real time with a
user-friendly approach.

Colorful was based in rainbow-mode source, but colorful diverged in
other way being more friendly, customizable and allow converting color
to others with mouse clicks or keybindings such as css rgb/hsl to hex,
or hex to color name and allow using prefix/suffix as indicator or
highlight it using overlays, also it has support for mouse clicks for
changing colors or using keybindings.

The source can be found at: https://github.com/DevelopmentCool2449/colorful-mode

Thanks.