Use fixed revision in svn:externals property.

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/branches/2.3.0@1436590 13f79535-47bb-0310-9956-ffa450edef68
Add the txt files containing the tutorial output so we can regenerate the site.

git-svn-id: https://svn.apache.org/repos/asf/ant/ivy/core/branches/2.3.0@1436591 13f79535-47bb-0310-9956-ffa450edef68