Updates suit-utils to 0.8.0

I was getting an error when running `bower install suit`.

```bash
bower suit-utils-space#~0.1.2         
ECMDERR Failed to execute "git ls-remote --tags --heads git://github.com/suitcss/utils-space.git", exit code of #128
```

* Update 'suit-utils' to 0.8.0
* 'suit-utils' 0.7.1 has 'suit-utils-space' as a dependency, but that
repository doesn't exist anymore.

_NOTE: Not sure if updating suit-utils to 0.8.0 causes any other problem that I'm might not aware of._