Added the image of the blog to the article block.

Signed-off-by: Gabriela Navarro <navarro1703@gmail.com>
SIgned-off-by: Tales Martins <tales.martins@gmail.com>
Fixed the following conflicts:
	plugins/display_content/lib/display_content_block.rb
	plugins/display_content/views/box_organizer/_display_content_block.rhtml

Signed-off-by: Gabriela Navarro <navarro1703@gmail.com>
Signed-off-by: Tales Martins <tales.martins@gmail.com>