add description about testcafe (egoist#99)

Author: miherlosev

README.md

@@ -18,6 +18,7 @@ If you have been suffering from configuration hell, give [vbuild](https://github
 - [Babel 6](/docs/babel.md)
 - [PostCSS](/docs/postcss.md)
 - [JSX components are supported by default](/docs/jsx.md)
+- [Testcafe](/docs/testcafe.md)
 - [Electron support](/docs/electron.md) (optional)
 - [CSS modules](/docs/css-modules.md) (optional)
 - A boilerplate which is small and focusing on client-side apps
@@ -77,7 +78,8 @@ If you did not enable Eletron support, the dest folder is `./dist`, otherwise it
 ├── client          # client-side app files
 ├── dist            # bundled files and index.html
 │    ├── index.html
-│    └── [...other bundled files]   
+│    └── [...other bundled files]  
+├── tests           # e2e tests written by testcafe 
 ├── node_modules    # dependencies
 └── package.json    # package info
 ```

docs/testcafe.md

@@ -0,0 +1,17 @@
+# Testcafe
+
+Template contains an example of e2e tests written by [testcafe](http://github.com/devexpress/testcafe).
+
+## Structure
+`tests/index.js` contains the first test.
+
+`tests/page-model.js` contains [Page Model](https://martinfowler.com/bliki/PageObject.html) that describes the `index.html` page.
+
+## Run
+`npm run test`
+
+e2e tests will run for all browsers that installed on target machine.
+
+For details, see section `scripts/test` of `package.json` file 
+and [testcafe documentation](https://devexpress.github.io/testcafe/documentation/)
+