Fixes: https://github.com/resin-io/etcher/issues/191
`SettingsService` is injected manually using `$injector` to a void a circular dependency over `$rootScope` by `$localStorage`.
These are files that contain static rules that are not likely change nor require the advanced functionality that SASS requires. This is the first step towards an attempt to get rid of preprocessor and use native supported web technologies.
