Fixed several issues with templates and template styling

Fixed several issues with templates and template, including added badge/style buttons and links to several different areas of the template for easier navigation, moving URL generation logic from templates to view, adding an open_issues and closed_issues flag to the ProjectDetailView that allows for the generation of different blocks depending on whether there are any links with "closed" or "opened" state issues.

Addresses: #13 (closed) #10 (closed) #9 (closed)