Css modules

[iam4x]

Add css-modules support via webpack css-loader and usage of isomorphic-style-loader for server side rendering with only critical styles.

It works in dev mode for now this way:

1. start webpack-dev-server to compile client code and starting browser sync server
2. compile code for server side rendering and start koa render server

So now we have two webpack instances, a webpack-dev-server watching for changes to hot reload client side code. And another one that we programatically spawn when koa render server restart is requested. (On typing rs into terminal or when code changes into ./server/** directory) -> Browser get automatically reloaded after a render server restart.

I have included also a minimal postcss stack to work a la SCSS 🌟

TODO

• Add css-modules support
• Find a way to include externals css framework like twitter bootstrap
• Add styles example on todos component