Update README.rst

README.rst

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-.. image:: https://badge.fury.io/py/cmf.svg
+|lic| |zeno| |pypi| |travis| |appveyor|
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+.. |lic| image:: https://raw.githubusercontent.com/philippkraft/cmf/master/documentation/media/license-GPLv3-green.svg?sanitize=true
+ :target: https://opensource.org/licenses/GPL-3.0
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+.. |zeno| image:: https://zenodo.org/badge/DOI/10.5281/zenodo.1125290.svg
+ :target: https://doi.org/10.5281/zenodo.1125290
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+.. |pypi| image:: https://badge.fury.io/py/cmf.svg
  :target: https://pypi.python.org/pypi/cmf/
-.. image:: https://api.travis-ci.org/philippkraft/cmf.svg
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+.. |travis| image:: https://api.travis-ci.org/philippkraft/cmf.svg 
  :target: https://travis-ci.org/philippkraft/cmf
-.. image:: https://ci.appveyor.com/api/projects/status/24crp4ejkacykkrk?svg=true
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+.. |appveyor| image:: https://ci.appveyor.com/api/projects/status/24crp4ejkacykkrk?svg=true
  :target: https://ci.appveyor.com/project/philippkraft/cmf
-.. image:: https://raw.githubusercontent.com/philippkraft/cmf/master/documentation/media/license-GPLv3-green.svg?sanitize=true
- :target: https://opensource.org/licenses/GPL-3.0
-.. image:: https://zenodo.org/badge/DOI/10.5281/zenodo.1125290.svg
- :target: https://doi.org/10.5281/zenodo.1125290
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 Modelling water and solute fluxes
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