Rewrite @import paths

[coditect]

The documentation for sass-resources-loader makes it quite clear that @import rules are not allowed in resource files. However, I have found them to be unavoidable when working with Foundation for Sites. My changes give sass-resources-loader the ability to rewrite the paths of any @import rules found in resource files so that sass-loader can resolve those imports later in the build process.

Potential issues:

• No attempt it made to escape disallowed characters in the rewritten import paths.
• Not compatible with import directives in LESS. Workaround provided in 6582c4e.

---

This change is 

[justin808]

@coditect FABULOUS! I'll review (and merge) once you

• Add docs
• Add example verifying this work
• Add CHANGELOG entry to your PR.

[coditect]

@justin808 I added docs and an example as requested. Anything else?

[alex35mil]

@coditect The initial reason why imports are not allowed is that it slows down incremental builds significantly (see #5). I assume this issue still persist w/ this change, so I'd add to the docs the reason why @imports should be avoided.

The rest LGTM, thanks for doing this!

[justin808]

@alexfedoseev are you going to merge and update the npm library?

[justin808]

@alexfedoseev want me to merge and update NPM?

[IAMtheIAM]

Please release via NPM