Set default encoding for compass

[kinglozzer]

See haml/haml#269 for a bit more info. Seems that OS X Mavericks causes this to occur, even when system default is set to utf-8.

[kinglozzer]

Sorry, should probably have raised this against master

[chillu]

Do we have non-ascii characters in our core SCSS? What's the error you're getting? Not on Mavericks yet so can't verify.

[kinglozzer]

Compass Error:�[31m�[0mSass::SyntaxError on line ["562"] of ../framework/scss/GridField.scss: Invalid US-ASCII character "\xE2"Run with --trace to see the full backtrace:

https://github.com/silverstripe/silverstripe-framework/blob/3.1/scss/GridField.scss#L562

It's the quote mark it doesn't like. Replacing it does fix it - it appears there are no other non-ascii characters, would that be a preferred fix?

[chillu]

Ah OK so this is a Ruby 2.0 (default on Mavericks) issue rather than OSX or Compass itself, right? Meh, if its that fragile then removing the quote will just invite the same error again down the line. But can you please add the same fix to framework/admin/config.rb and cms/config.rb, and check those still compile? @wilr OK with that?

[kinglozzer]

I believe so, see what @wilr linked here silverstripe/silverstripe-cms#888:

Compass/compass#377.

Added to both, they still compile fine. Though I always get minor differences with the compiled CSS vs what's currently committed (such as whitespace, rule orders, different hex codes for gradient colour stops etc) - I wonder if that's because I'm using a more recent version of compass than when they were committed and the lighten()/darken() functions etc have been updated.

[chillu]

Thanks Mr. Loz :)