Start to overhaul report page

I am still busy with adapting the layout to Bootstrap 3. Now I am
starting to tackle the whole report page. I have removed a probably
unnecessary layout file and added the breadcrumb navigation.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Replace metrics directory with module string

I simply made the eager loader method a little bit more flexible.
Instead of defining the full path, the last directory is derived
from the module name.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Reorganize Twitter Bootstrap Glyphicons

In a pull request I found a nice description how to set up Bootstrap
Glyphicons nicely as SASS. I have applied this by moving the fonts
folder, renaming the stylesheet and changing the font path.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Change back to branch 3 for Bootstrap

I do not know why, but this works great now, thus I am using the branch
3 again for the Bootstrap 3 dependency.

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

Just added a bit styling to the report buttons, changed the glyphicon,
etc.

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