Fix PHPUnit warnings

Update tests so they pass on master branch

Note: Tests will fail on PHP 5.6

added correct group declarations to tests

Fix local links to not included sections, fixes #108

This transforms local links in an included page into internal links if
the page hasn't been fully included. This doesn't consider the case that
t

Fix local links to not included sections, fixes #108

This transforms local links in an included page into internal links if
the page hasn't been fully included. This doesn't consider the case that
the target section (but not the full page) has been included at another
place in the page as this is considered to be rather unlikely.

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