add label-maker binder (#119)

Author: giswqs

examples/label-maker-binder.md

@@ -0,0 +1,12 @@
+# Using label-maker in an interactive notebook on the cloud
+
+[![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/giswqs/label-maker-binder/master)
+
+## Usage
+
+* Launch [Binder](https://mybinder.org/v2/gh/giswqs/label-maker-binder/master) 
+* A Jupyter Notebook will open in your browser
+* Open **config.json** and replace **ACCESS_TOKEN** with your [mapbox access token](https://www.mapbox.com/account/access-tokens). You can also change the content of **config.json** (e.g., *country, bounding_box*) if needed.
+* Save changes to **config.json** (Menu - File - Save)
+* Open **label-maker-binder.ipynb** and start running cells 
+