Added Zope's test.py, and a unit test to sxp. This test itself isn't very

exciting, but it's there to encourage the creation of more interesting ones.  A
test target has been added to the main Makefile, and the one in tools/python.

Signed-off-by: Ewan Mellor <ewan@xensource.com>

tools/python/setup.py

@@ -42,7 +42,9 @@ setup(name            = 'xen',
                          'xen.xend.xenstore',
                          'xen.xm',
                          'xen.web',
-                         'xen.sv'
+                         'xen.sv',
+
+                         'xen.xend.tests'
                          ],
       ext_package = "xen.lowlevel",
       ext_modules = [ xc, xs ]