Merge pull request #21 from solarnz/usage-documentation

Update the usage documentation page to show the correct nodeinfo command.
diff --git a/doc/source/usage.rst b/doc/source/usage.rst
index bcd5450..7a6c1d8 100644
--- a/doc/source/usage.rst
+++ b/doc/source/usage.rst
@@ -22,7 +22,7 @@
 instructions <install>`, try to run it from the source directory like this::
 
   $ reclass -b examples/ --inventory
-  $ reclass -b examples/ --node localhost
+  $ reclass -b examples/ --nodeinfo localhost
 
 This will make it use the data from ``examples/nodes`` and
 ``examples/classes``, and you can surely make your own way from here.
@@ -30,7 +30,7 @@
 On Debian-systems, use the following::
 
   $ reclass -b /usr/share/doc/reclass/examples/ --inventory
-  $ reclass -b /usr/share/doc/reclass/examples/ --node localhost
+  $ reclass -b /usr/share/doc/reclass/examples/ --nodeinfo localhost
 
 More commonly, however, use of |reclass| will happen indirectly, and through
 so-called adapters. The job of an adapter is to translate between different