Switch the coverage badge in README to codecov.io too

Author: renefritze

README.md

@@ -1,4 +1,4 @@
-[![Coverage Status](https://coveralls.io/repos/github/pyscience-projects/pyevtk/badge.svg?branch=master)](https://coveralls.io/github/pyscience-projects/pyevtk?branch=master)
+[![Coverage Status](https://codecov.io/gh/pyscience-projects/pyevtk/branch/master/graph/badge.svg)](https://codecov.io/gh/pyscience-projects/pyevtk)
 [![Build Status](https://travis-ci.org/pyscience-projects/pyevtk.png?branch=master)](https://travis-ci.org/pyscience-projects/pyevtk)
 
 PREAMBLE:
@@ -104,4 +104,4 @@ That should create a points.vtu file in the current directory.
 SUPPORT:
 =======
 
-I will continue releasing this package as open source, so it is free to be used in any kind of project. I will also continue providing support for simple questions and making incremental improvements as time allows. However, I also  provide contract based support for commercial or research projects interested in this package or in topics related to data analysis and scientific programming with Python, Java, MATLAB/Octave, C/C++ or Fortran. For further details, please contact me to: paulo.herrera.eirl@gmail.com.
+I will continue releasing this package as open source, so it is free to be used in any kind of project. I will also continue providing support for simple questions and making incremental improvements as time allows. However, I also  provide contract based support for commercial or research projects interested in this package or in topics related to data analysis and scientific programming with Python, Java, MATLAB/Octave, C/C++ or Fortran. For further details, please contact me to: paulo.herrera.eirl@gmail.com.