[enh] #96 add install from test.pypi.org command in README

README.rst

@@ -121,6 +121,10 @@ Deploy the package on the Pypi test repository (use a space before make to not k
 
     [SPACE]make deploy_test PYPI_PASSWORD=xxxx
 
+Test the Pypi installation::
+
+    pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.python.org/simple/ duniterpy
+
 Deploy the package on the Pypi repository (use a space before make to not keep command with password in shell history)::
 
     [SPACE]make deploy PYPI_PASSWORD=xxxx