Redirect the docs.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@13 71dcc9de-d417-0410-9af5-da40c76e7ee4

doc/README

+You can find historical information in this directory.
+The most updated documents are available from the portal:
+
+https://www.nexedi.org/workspaces/neo/view