[CONFIGURATION-592] Changed link to 1.10 user guide on site menu.

A relative link to pages generated during the build is now used.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1629231 13f79535-47bb-0310-9956-ffa450edef68
[CONFIGURATION-592] Slight adaptations in index of user guide.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1629232 13f79535-47bb-0310-9956-ffa450edef68
[CONFIGURATION-592] Adapted links to API docs.

Links referencing Javadocs from the 1.10 user's guide have to be adapted to the
new site structure.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1629233 13f79535-47bb-0310-9956-ffa450edef68