Reduced the complexity in the code a little.
Dashboards now have slug metadata.
Updated the module template to add links to sub modules.
We now have a common module style file.
Added style for link to sub module.
Add slug attribute to all dashboards
Made the code a bit more readable.
Fixing broken tests from linking to module.
Merge pull request #187 from alphagov/feature/addLinkForModule

Feature/add link for module