Small change in README

README.rst

@@ -109,15 +109,15 @@ And here is an image rendered for parse tree for the above parsed calc expressio
 
 .. image:: https://raw.githubusercontent.com/igordejanovic/Arpeggio/master/docs/images/calc_parse_tree.dot.png
 
-Questions, discussion etc.
---------------------------
+Discuss, ask questions
+----------------------
 Please use `discussion forum`_ for general discussions, suggestions etc.
 
 If you have some specific question on Arpeggio usage please use `stackoverflow`_.
 Just make sure to tag your question with :code:`arpeggio`.
 
-Contributions
--------------
+Contribute
+----------
 Arpeggio is open for contributions. You can contribute code, documentation, tests, bug reports.
 If you plan to make a contribution it would be great if you first announce that on the discussion forum.