Merge pull request #65 from lk108/master

Adapted pages to new layout
Merge pull request #66 from lk108/master

Corrected <code> to <pre>
Merge pull request #67 from lk108/master

Adapted page to new layout
Merge pull request #68 from lk108/master

corrected link
Adapted to standard layout; small corrections; added link to page with similar content
Deleted content also present in other location. Linked this other location. Other small corrections.
Adapted to standard layout. Added further information (on xtrlock). Some small changes.
Added standard layout