Fix the pyrasite-memory-viewer installation

README.rst

@@ -88,7 +88,7 @@ Pyrasite also provides a tool to view the values of largest objects in your proc
 
 ::
 
-    $ python tools/memory-viewer.py <PID> objects.json
+    $ pyrasite-memory-viewer <PID> objects.json
 
 
 .. image:: http://lewk.org/img/pyrasite-memory-viewer.png

setup.py

@@ -25,6 +25,7 @@ setup(name='pyrasite',
       entry_points="""
           [console_scripts]
           pyrasite = pyrasite.main:main
+          pyrasite-memory-viewer = pyrasite.tools.memory_viewer:main
       """,
       classifiers=[
           'Development Status :: 4 - Beta',