adds a screenshot

Author: JohannesHoppe

README.md

@@ -1,15 +1,20 @@
 # angular-cli-ghpages
 
+<hr>
+
+![Screenshot](screenshot-travis.png)
+
+<hr>
+
 Angular CLI addon. Publish to any gh-pages branch on GitHub (or any other branch on any other remote).  
-This is __NOT__ [IgorMinar/angular-cli-github-pages](https://github.com/IgorMinar/angular-cli-github-pages). Brought to you by the [angular2buch.de](https://angular2buch.de/) team! 
+Made for Travis-CI. Brought to you by the [angular2buch.de](https://angular2buch.de/) team! 
 
 ## WHY?
 
-[IgorMinar/angular-cli-github-pages](https://github.com/IgorMinar/angular-cli-github-pages) is limited to the `gh-pages` branch of the same repository.
+This is __NOT__ [IgorMinar/angular-cli-github-pages](https://github.com/IgorMinar/angular-cli-github-pages). That addon is limited to the `gh-pages` branch of the same repository.
 
 In contrast to this, the [Angular2Buch/angular-cli-ghpages](https://github.com/Angular2Buch/angular-cli-ghpages) addon is able to push to any branch on any repository. It's build on top of [tschaub/gh-pages](https://github.com/tschaub/gh-pages).
-
-__This addon works great on [Travis-CI](https://travis-ci.org/).__
+__This addon works great on [Travis-CI](https://travis-ci.org/).__ No git credentials must be set up in before. Specific environment variables of Travis-CI are evaluated, too.
 
 ## Installation & Setup
 
@@ -91,7 +96,27 @@ In example, the following command runs [on our Travis-CI](https://travis-ci.org/
 ng build --environment=production
 ng ghpages --repo=https://[email protected]/Angular2Buch/book-monkey2-public.git --name="The Buildbot" [email protected]
 ```
-> REPO_USER_AND_PASS stores credentials in the format `username:password`. Special charcaters must be [percent-encoded](https://en.wikipedia.org/wiki/Percent-encoding).
+> REPO_USER_AND_PASS stores credentials in the format `username:password`. Special charcaters must be [percent-encoded](https://en.wikipedia.org/wiki/Percent-encoding).
+
+### A hint for angular-cli
+
+Your build can break if `angular-cli` from package.json and the global `ng` command have different versions.  
+You might want to define a run-script like this: 
+
+```js
+  "scripts": {
+    "start": "ng server",
+    "ng": "ng"
+  }
+```
+
+Now you can avoid a gloabl `ng` like this:
+
+```npm run ng -- ghpages --repo=https://XXX```
+
+The special extra option `--` is used to delimit the end of the command. npm will pass all the arguments after the -- directly to your script. __Happy building!__
+
+
 
 ## License
 Code released under the [MIT license](https://opensource.org/licenses/MIT).