move badge to codecov

Author: satra

doc/_templates/indexsidebar.html

@@ -6,7 +6,7 @@ <h3>{{ _('Links') }}</h3>
     <li>Code: <a href="http://github.com/nipy/nipype">Github</a> · <a href="http://github.com/nipy/nipype/issues">Bugs-Requests</a></li>
     <li>Forum: <a href="http://neurostars.org/t/nipype">User</a> · <a href="http://projects.scipy.org/mailman/listinfo/nipy-devel">Developer</a></li>
     <li><a href="about.html#funding">Funding</a> · <a href="http://nipy.org/software/license/index.html"><img src="https://img.shields.io/pypi/l/nipype.svg" alt="License"></a></li>
-    <li><a href="https://travis-ci.org/nipy/nipype"><img src="https://travis-ci.org/nipy/nipype.png?branch=master" alt="travis"></a> · <a href='https://coveralls.io/r/nipy/nipype'><img src='https://coveralls.io/repos/nipy/nipype/badge.png' alt='Coverage Status' /></a></li>
+    <li><a href="https://travis-ci.org/nipy/nipype"><img src="https://travis-ci.org/nipy/nipype.png?branch=master" alt="travis"></a> · <a href='https://codecov.io/gh/nipy/nipype'><img src='https://codecov.io/gh/nipy/nipype/branch/master/graph/badge.svg' alt='Coverage Status' /></a></li>
     <a href='https://pypi.python.org/pypi/nipype/'><img src='https://img.shields.io/pypi/pyversions/nipype.svg' alt='Python Versions' /></a></li>
 </ul>