mfb.scss unsuable without _/_slidein.scss in distribution

[rzymek]

Problem
The mfb.scss file included in the npm distribution references _/_slidein.scss which is not included.
That makes mfb.scss almost unusable. That is

@import '~react-mfb/mfb.scss'; 

causes

ERROR in ./node_modules/css-loader!./node_modules/sass-loader/lib/loader.js?{}!./src/app/mfb.scss
Module build failed: 
@import "_/_slidein";
^
      File to import not found or unreadable: _/_slidein.

Solution
Include mfb/src/_ folder in the npm distribution.

Workaround
When using webpack with sass-loader

1. Include a copy of mfb/src/_ in your project's sources, e.g in src/_ folder
2. In webpack.config.js include:

    module: {
        rules: [
           /*...*/
            {
                test: /\.scss$/,
                use: [
                    'style-loader',
                    'css-loader',
                    {
                        loader: 'sass-loader',
                        options: {
                           /* or other directory where you've placed the copy of _*/
                            includePaths: ["src"] 
                        }
                    }
                ]
            }
        ]
    },