Bump jRuby and Sass versions

Cleaned up some properties that were no longer used as removing them
seperatly would change the hash
Don't force jRuby into 1.8 mode

https://github.com/chriseppstein/compass/pull/1134 shows that it was an
issue with the tests, not running in 1.9 mode
Use production Compass mode

Does some optimizations
Revert "Don't force jRuby into 1.8 mode"

This reverts commit d57a89c642fef49e4bff5abf6a22a8a09c7a9d7d.
Merge pull request #954 from nschonni/update-sass-and-jruby

Update sass and jruby