webpack_blueimp_fix.js

// in webpack.config.js
module: {
    loaders: [
        {
            test: require.resolve('blueimp-bootstrap-image-gallery/js/bootstrap-image-gallery'),
            loader: 'imports?define=>false,blueimp=blueimp-gallery'
        },
        {
            test: require.resolve('blueimp-gallery'),
            loader: 'imports?define=>false'
        }
    ]
}

// in your module
import 'blueimp-bootstrap-image-gallery/js/bootstrap-image-gallery.js';
import blueimp from 'exports?window.blueimp!blueimp-gallery'

Overrides blueimp-image-gallery's relative requiring by telling it not to do amd and just export itself as blueimp.
See stackoverflow question.

You will need to npm install imports-loader exports-loader --save