update libsass to 3.1 release

[drewwells]

Minor version 3.1.0 of release has landed. This updates the version and sha to the new release "Bulleit Bottle" sass/libsass#697

[DomT4]

The devel do block can be killed, since stable now outdates devel :). Does sassc need a revision to cope with the API changes, or is it good?

[drewwells]

I figure we could leave devel around since it will be useful very soon for tracking 3.2. I don't know what the normal practice for homebrew is, but I'd appreciate keeping the code there for easily updating it to 3.2.

I should update sassc, it will be broken.

[DomT4]

It'll need to be chopped, I'm afraid. The bot red-flags a situation where stable outdates devel, because you get the situation where people install devel thinking it's more recent than stable and then the complaints come flooding in 😉. It's a tiny block of code very easily added back in as soon as there's a new devel though :).

The syntax is always

devel do
   url ""
   sha1 ""
end

Cool. Just tack a revision 1 underneath the SHA in the sassc formula and we should be golden.

[drewwells]

Ahh okay, I'll remove it. It looks like sassc does not have a 3.1 release. I'll report back what I find about that backwards compat situation.

Well, luckily, SassC is the official binary wrapper for libsass and is always kept in sync.

[DomT4]

It looks like sassc does not have a 3.1 release.

Weird. They're supposed to be released in-sync, as you highlight. Cheers for taking that upstream to ask what the situation is.

I don't know if the arbitrary change will be enough, you may need to make an actual revision to force the bot. Not sure. Guess we'll see 😉.

[drewwells]

Fortunately @xzyfer shipped a release of sassc for brew! https://github.com/sass/sassc/releases/tag/3.1.0

[drewwells]

I'm getting a lot of strange errors, I'm going to split this commit into two PR

[MikeMcQuaid]

Thanks for your contribution to Homebrew! For future reference the preferred commit message format for simple version updates is libsass 3.1.0.