Corrected the make clean command in the doc directory.

doc/Makefile

@@ -20,7 +20,7 @@ help:
 	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
 
 clean:
-	-rm -rf $(BUILDDIR)/{html,doctest} 
+	-rm -rf $(BUILDDIR)/html $(BUILDDIR)/doctest $(BUILDDIR)/doctrees
 
 html:
 	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html

doc/installation.rst

@@ -7,8 +7,10 @@
   To follow these instructions locally you will need a local copy of this
   package. Start by cloning this project with something like::
 
-    $ git clone https://github.com/bioidiap/bob.example.faceverify.git
-    $ cd bob.example.faceverify
+.. code-block:: sh
+
+  $ git clone https://github.com/bioidiap/bob.example.faceverify.git
+  $ cd bob.example.faceverify
 
 
 Installation of the toolkit uses the `buildout <http://www.buildout.org/>`_