Add json loader

[roonyh]

Adding json-loader to default storybook loaders. This is a fix for storybook-eol/react-storybook-addon-info#12.

[danielkcz]

I see a tiny problem here. In my webpack config I already have json loader defined to load JSON files within my application.

{ test: /\.json$/, loader: 'json', include: srcPath },

In storybook/webpack.config.js I have it like this.

var pathUtils = require('path');
var merge = require('webpack-merge');
var validate = require('webpack-validator');
var baseConfig = require('../webpack.config.js');

module.exports = function(storybookConfig) {
    var config = merge.smart(storybookConfig, {
        devtool: 'source-map',
        module: baseConfig.module,
        resolve: baseConfig.resolve,
    });
    return validate(config);
};

That means the json loader will be merged together and include path will be preserved there causing that addon requirement wont be fulfilled anyway.

[arunoda]

We fix this with a much better way. See: storybook-eol/react-storybook-addon-info#12