New blocktype to display a simple text

Bug 1339113: A blocktype to display a plain snipped of text on a page that is
not connected to any artefact and therefore does not cause unintentioned side
effects when content is added on a view that has been copied.

Change-Id: Ib01448cf08f08ff5738bd1814d9e2027daff006d
Signed-off-by: Tobias Zeuch <tobias.zeuch@kit.edu>
Merge "New blocktype to display a simple text"