NEO: add dependency to msgpack-python

We'll probably change the protocol to use msgpack instead of trees of Python
structs. By adding the dependency now, it will be possible to update the NEO
code (which is in development mode) without rebuilding the whole software.

software/neoppod/software-common.cfg

@@ -11,6 +11,7 @@ extends =
 #LXML
     ../../component/lxml-python/buildout.cfg
 #END LXML
+    ../../component/msgpack-python/buildout.cfg
     ../../component/patch/buildout.cfg
     ../../component/python-mysqlclient/buildout.cfg
     ../../component/python-cryptography/buildout.cfg
@@ -41,6 +42,7 @@ environment = neoppod-setup-env
 [neoppod]
 recipe = zc.recipe.egg
 eggs = neoppod[admin, ctl, master, storage-mysqldb]
+  ${msgpack-python:egg}
   ${python-mysqlclient:egg}
   psutil
   BTrees