Continue to refactor the breadcrumb navigation

Now I have replaced both dropdown menus with the partial I have created.
I had to do further changes to make this work nicely.

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

I am adapting the configuration route to the REST convention as
described in the Rails guide. I started with the report link for
selecting a repository.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Continue to restructure REST structure

I am taking further steps for the REST approach. I will resolve the
reports controller and distribute the code over repositories and metrics
controller.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Rename view files for repository controller

Adapting the verb style I have renamed the repository views.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Link between repositories index and show

Since I am starting to remove the report controller, I have added links
to interconnect repositories index and repositories show.

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