Add Makefile target to check the format of the README.rst file.

Signed-off-by: Michael Price <loneviking72@gmail.com>
Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -59,6 +59,7 @@
 - Add upload wizard step chapte.
 - Improve and add additional diagrams.
 - Change documenation theme to rtd.
+- Fix "check for update" feature.
 
 2.8 (2018-02-27)
 ================

Makefile

@@ -352,3 +352,6 @@ build:
 	cp -r /host_home/.pypirc ~/.pypirc && \
 	make wheel && \
 	cp dist/* /host_source/dist/"
+
+check_readme:
+	python setup.py check -r -s

docs/topics/development.rst

@@ -421,6 +421,11 @@ Release checklist
 8. Check README.rst format with::
    
     $ python setup.py check -r -s
+
+or with::
+
+    $ make check_readme
+
     
 9. Build source package and test::