Improve styles of the campaing landing.

[davidbeig]

When publishing a project in the component, and the project has already finished, the text about the project passing date makes the "opt" label non visible. Also it has a light gray that might be difficult to read.

The project information is not shown correctly, the markdown description of the project, as well as the images, but this seems more of a problem from the goteo perspective. It should be either fixed there or in this plugin.

I know that the last issue is already posted in #31