css white background

Signed-off-by: pntruongan <pntruongan@pnta-laptop.localdomain>
Merge branch 'master' of ssh://git@github.com/cntn02/Semantic-document-base.git
minor bug fix


Signed-off-by: pntruongan <pntruongan@pnta-laptop.localdomain>
start work on keyphrase merger