Use old-style hash syntax to enable compatibility with ruby 1.8.7

[teancom]

Some of us are still stuck on Centos 6.x with ruby 1.8.7. Yes, it sucks. Yes, we're trying to move. In the meantime, this allows us to use smashing with dashing-icinga2.

Thank you!

[terraboops]

Yeah, cool. Generally I am against moving backwards, but since I don't see how this makes future contributions harder and adds value for backwards compatibility - awesome.

Thanks for contributing!

[webmaster128]

I think we should define an officially supported minimum Ruby version for each major release of smashing, because if we want to support Ruby 1.8.7, we cannot upgrade dependencies like e.g. sprockets, which requires Ruby 1.9.3 starting with sprockets version 3. It would be very unfortunate if smashing breaks for users because people upgrading gems miss such a patch PR.