hippo regex

/binaries/content/gallery/ is used for the image library

Signed-off-by: Hanno Lans <hanno@hannolans.nl>
icon for Hippo

Signed-off-by: Hanno Lans <hanno@hannolans.nl>
improved regex

Signed-off-by: Hanno Lans <hanno@hannolans.nl>
regex excluding plain text for Hippo

Signed-off-by: Hanno Lans <hanno@hannolans.nl>
Merge pull request #598 from KINGgemeenten/Hippo

Added detection for Hippo