LAB gets its own class

[daveheitzman]

I'm creating this changeset as a pull request rather than pushing directly to color/master as I'd rather you reviewed it and approve of the direction I'm going here.

contrast can now be passed a symbol to specify which algorithm to use. We have 3 algorithms available at present.

[halostatue]

Thanks—I want to release 1.6 first and then we can start working with this and another change that's been proposed (y implementation of YIQ is totally borked) to release as 2.0 next month or so.

I'll look at this over the weekend (long weekend here in Canada).

[daveheitzman]

That's perfect. On another note, travis keeps failing. do you know how to fix? (locally, it complains it cannot load simplecov)

[halostatue]

Yeah. Edit .travis.yml to remove 1.9.2 entirely; also, change rbx to rbx-2 and remove the installation of ruby-sl in the before script.

All changes I need to make on master for the next release regardless. SimpleCov appears to behave very badly under Ruby 1.9.2, and I'm not going to explicitly support it with any of my projects anymore (but I probably won't block people from upgrading to it).

As a side note, since I'm targeting LAB for Color 2.0, I'm probably going to drop Ruby 1.8 support in the same timeframe.

[daveheitzman]

okay, thanks. I'll just wait for you to push a change for that, and put up with travis failing for 1.9.2 in the meantime.

In my opinion, continued support for 1.8.7 would be a worthwhile priority, unless there are desirable features that very hard to implement with it.

[halostatue]

I'm closing this in favour of #12, which is your code here targeted to the 2.0 release. It will hopefully also pass unit tests. ;)