The JsColor License is too restrictive

[ghost]

Hi, I noticed that JsColor, one of litegui's dependencies has quite a restrictive license that would not allow us to continue using litegui.

Would you be open to a pull request that replaces jsColor with a similar library but with a more flexible license (for instance, Spectrum)?

Thanks.

[jagenjo]

totally, and I always wanted to replace jscolor, right now is the only dependency that litegui has, and it is not that good. I just wanted a couple of its functionalities, so if you managed to make it work without breaking the callback of addColor, I am totally fine.