Improved readme.

README.rst

@@ -1,22 +1,30 @@
 =========
 Automaton
 =========
-A minimal python finite-state machine. Automaton requires Python >= 3.4.
 
-.. image:: https://travis-ci.org/fmontag451/automaton.svg?branch=master
+A minimal python finite-state machine.
+
+|build-status| |coverage-status| |documentation-status| |license-status|
+
+See the full documentation at http://automaton.readthedocs.org.
+
+Contributors
+============
+
+Thanks to `@simone-campagna <http://github.com/simone-campagna>`_.
+
+.. |build-status| image:: https://travis-ci.org/fmontag451/automaton.svg?branch=master
     :target: https://travis-ci.org/fmontag451/automaton
     :alt: Build status
 
-.. image:: https://readthedocs.org/projects/automaton/badge/?version=latest
+.. |documentation-status| image:: https://readthedocs.org/projects/automaton/badge/?version=latest
     :target: http://automaton.readthedocs.org/en/latest/?badge=latest
-    :alt: Documentation Status
+    :alt: Documentation status
 
-.. image:: https://coveralls.io/repos/fmontag451/automaton/badge.svg?branch=master&service=github
+.. |coverage-status| image:: https://coveralls.io/repos/fmontag451/automaton/badge.svg?branch=master&service=github
     :target: https://coveralls.io/github/fmontag451/automaton?branch=master
     :alt: Coverage report
 
-.. image:: https://img.shields.io/badge/license-Apache2.0-blue.svg
+.. |license-status| image:: https://img.shields.io/badge/license-Apache2.0-blue.svg
     :target: http://opensource.org/licenses/Apache2.0
-    :alt: License
-
-See the full documentation at http://automaton.readthedocs.org.
+    :alt: License