Imported library (OpenDolphin) not processed with TypeScript/webPack

Question

I have the following problem: I import a library uploaded to npm, OpenDolphin, which seems to be implemented in TS with a main.js with all the export declarations.

I try to use the library in my TypeScript code like following:

import { OpenDolphin, ClientDolphin } from 'openDolphin/main';

Then I try to use this:

    let builder = OpenDolphin.makeDolphin();

After transpiling this to ES5, I get the following error in chrome:

SyntaxError: Unexpected token export 

It seems, that the main.js of the library containing the export statements, are somehow not processed and just append to the final dist file:

//snipped from the final js file
/* 469 */
/***/ function(module, exports) {

export { Attribute } from './js/dolphin/Attribute'; 
    ...all the rest of OpenDolphin export statements.

}

For me, as a TS (JS Toolchain) beginner, it seems, that this library is somehow not correctly processed/transpiled or something similiar.

My setup:

package.json:

{
  "name": "FrontendExample",
  "version": "1.0.0",
  "private": false,
  "description": "",
  "author": "<AUTHOR>",
  "license": "MIT",
  "preferGlobal": false,
  "scripts": {
    "build": "webpack --display-error-details"
  },
  "dependencies": {
    "@cycle/rxjs-run": "3.2",
    "@cycle/dom": "12.2.0",
    "@cycle/isolate": "1.4.x",
    "OpenDolphin": "1.0.1",
    "core-js": "2.4.1",
    "rxjs": "5.0.1",
    "ts-helpers": "1.1.2",
    "xstream": "9.2"
  },
  "devDependencies": {
    "@types/node": "6.0.42",
    "ts-node": "1.2.1",
    "tslint": "4.1.1",
    "typescript": "2.0.3",
    "typings": "2.1.0",
    "ts-loader": "^0.8.2",
    "webpack": "^1.13.1"
  }
}

webpack.config.js:

var webpack = require('webpack');
module.exports = {
    entry: './src/app.ts',
    output: {
        filename: './dist/main.js'
    },
    // Turn on sourcemaps
    devtool: 'source-map',
    resolve: {
        extensions: ['', '.webpack.js', '.web.js', '.ts', '.js']
    },
    // Add minification
    // plugins: [
    //     new webpack.optimize.UglifyJsPlugin()
    // ],
    module: {
        loaders: [
            { test: /\.ts$/, loader: 'ts' }
        ]
    }
};

Update 1:

Only importing

import { OpenDolphin, ClientDolphin, ClientPresentationModel, ClientAttribute, Tag } from 'openDolphin';

doesn't help, the same error remains. But, Intellij will additionally mark the import in the TS-File red. I'm... unsure if the OpenDolphin npm package is correct: It only contains a main.js, main.d.ts, a package.json with no hint of browserify, babelify or something else, a js folder with all the *.ts files...?