Refs #1889: move News slideshow colours to CMS theme
Refs #1889: AEWA custom colours for News slideshow
Refs #1889: ASCOBANS custom colours for News slideshow
Refs #1889: EUROBATS custom colours for News slideshow
Merge pull request #44 from sandriu/master

Refs #1889: AEWA, ASCOBANS, EUROBATS custom colours for News slideshow