add mybinder badge (#45)

Author: bjlittle

README.md

@@ -11,23 +11,27 @@
 <p align="center">
 <a href="https://travis-ci.org/github/SciTools/tephi/branches">
     <img src="https://travis-ci.org/SciTools/tephi.svg?branch=master"
-         alt="Travis-CI" />
+        alt="Travis-CI" />
 </a>
 <a href="https://tephi.readthedocs.io/en/latest/?badge=latest">
     <img src="https://readthedocs.org/projects/tephi/badge/?version=latest"
-         alt="Documentation Status" />
+        alt="Documentation Status" />
 </a>
 <a href="https://coveralls.io/github/SciTools/tephi?branch=master">
     <img src="https://coveralls.io/repos/github/SciTools/tephi/badge.svg?branch=master"
-         alt="Coverage Status" />
+        alt="Coverage Status" />
 </a>
 <a href="https://github.com/SciTools/tephi/releases">
     <img src="https://img.shields.io/github/v/tag/scitools/tephi?color=orange"
-         alt="GitHub tag (latest by date)" />
+        alt="GitHub tag (latest by date)" />
 </a>
 <a href="https://github.com/SciTools/tephi/commits/master">
     <img src="https://img.shields.io/github/commits-since/scitools/tephi/latest/master"
-         alt="GitHub commits since tagged version" />
+        alt="GitHub commits since tagged version" />
+</a>
+<a href="https://mybinder.org/v2/gh/SciTools/tephi/master?filepath=index.ipyn">
+    <img src="https://mybinder.org/badge_logo.svg"
+        alt="Launch MyBinderk" />
 </a>
 <a href="https://github.com/psf/black">
     <img src="https://img.shields.io/badge/code/style-black-000000.svg"