Task Adapter 2.4.2: important bugfix for task relations

Task Adapter 2.4.2 brings several bug fixes, most importantly -

    * Task relations are now saved for all tasks, not only for the top-level ones.

The other changes are:</p>

    * Switched to the latest Vaadin web framework (7.0.0) * Minor bugfixes for Redmine and Basecamp connectors.

Download the latest Task Adapter version.</p>