Support nested classes and scss

[mrmckeb]

trafficstars

I think it should be easy to add SCSS and nested module support to this.

Are you happy for me to open a PR?

[Bnaya]

@mrmckeb if you have a fork with that code i will he happy to use it :)

[mrmckeb]

@Bnaya https://github.com/mrmckeb/typescript-plugin-css-modules :) Published to NPM too, adds a few new features.