Merge pull request #72 from althonos/master

Update readme

README.rst

@@ -2,44 +2,48 @@
 Python XMP Toolkit
 ==================
 
-.. image:: https://travis-ci.org/python-xmp-toolkit/python-xmp-toolkit.png?branch=master
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+   :alt: Build status badge
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+
 
 Python XMP Toolkit is a library for working with XMP metadata, as well as
 reading/writing XMP metadata stored in many different file formats.
 
-Python XMP Toolkit is wrapping Exempi (using ctypes), a C/C++ XMP library
-based on Adobe XMP Toolkit, ensuring that future updates to the XMP standard
-are easily incorporated into the library with a minimum amount of work.
+Python XMP Toolkit is wrapping `Exempi <https://libopenraw.freedesktop.org/wiki/Exempi/>`_
+(using ctypes), a C/C++ XMP library based on Adobe XMP Toolkit, ensuring that future
+updates to the XMP standard are easily incorporated into the library with a minimum
+amount of work.
 
 Python XMP Toolkit has been developed by:
  * ESA/Hubble - European Space Agency
  * ESO - European Southern Observatory
  * CRS4 - Centre for Advanced Studies, Research and Development in Sardinia
 
 Documentation
-============
-Documentation is available at <http://python-xmp-toolkit.readthedocs.org> or can be build using Sphinx: ::
+=============
+Documentation is available at `python-xml-toolkit.readthedocs.org
+<https://python-xmp-toolkit.readthedocs.org>`_ or can be built using Sphinx: ::
 
     pip install Sphinx
     python setup.py build_sphinx
 
 Testing
 =======
-Running the tests are as simple as: ::
+Running the tests is as simple as: ::
 
     python setup.py test
 
-or (to also show test coverage) ::
+or (to also show test coverage): ::
 
     source run-coverage.sh
 
-.. image:: https://d2weczhvl823v0.cloudfront.net/python-xmp-toolkit/python-xmp-toolkit/trend.png
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