Change readme for application.css

[14113]

It's not necessarily to add 'import' into application.css. We can use 'require'. It's faster and better for developing

[tough-griff]

Using the sprockets //= require directive is only advisable if you want to use Bootstrap without any sort of customization or overrides.

From http://guides.rubyonrails.org/asset_pipeline.html:

If you want to use multiple Sass files, you should generally use the Sass @import rule instead of these Sprockets directives. Using Sprockets directives all Sass files exist within their own scope, making variables or mixins only available within the document they were defined in.

So, I would disagree that //= require is "faster and better for developing" in all cases.

[yury]

I totally agree with @tough-griff

[yury]

Closing this for now