* Remove default next pages compilation from the main babel-loader.
This will fix the issue when the user ignore node_modules
via our .babelrc option.
* Change babel-loaders 'query' to 'options'.
That's what's supported/recommended in webpack 2
* Create a babel-preset for plugins and presets we use.
Anyone could get it via 'next/babel'
* Remove 'use strict' from the source.
* Add next/router to alias resolver in our babel preset.
