Add support for new colour spaces

[saivan]

http://stackoverflow.com/questions/2353211/hsl-to-rgb-color-conversion#9493060

Also add LAB and LCH spaces
as shown: https://en.wikipedia.org/wiki/HCL_color_space

[matuss1899]

I'll try this

[Fuzzyma]

Feel free to contact us on gitter if you need any help. Also make sure to work on the 3.0 branch. Good luck! :)

[matuss1899]

Hi, I created code to support required functionality outside of project, but I'm not really sure where to put them. I was thinking that maybe color.js or svg.js may be appropriate, but I'm not sure. Can you give me any directions regarding this?

[Fuzzyma]

Yes, it has to go into color.js. Please ignore all these comments sticking around there. They are basically for us, how we intend later api to work.

[saivan]

Okay, this is done now too, #939