Raise exception on missing Link Checker scores

I am raising the no scores exception if there are no Link Checker metric
results to display.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Remove fetch metadata method

A method to scroll through the metadata does not make sense for now.
Maybe I will add it later, but then I will implement it right away.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Store results of the Accuracy metric per record

In order to provide metric results in more detail for the Accuracy
metric as well I have added a hash table as well. This hash table
keeps track of the resource URLs and the received MIME type. This
commit fixes #17.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Generate new Report controller

The Report controller will be responsible for displaying details about a
repository. This will become the Repository Report Card.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Add layout file for repository report

For the repository report card I have added a layout page.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Add repository report JavaScript code

Just added JavaScript code similar to the present one to dynamically
select the repository to watch.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Change parameter for the repository report

Since the page name is repository I have changed the parameter from
repository to show.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>