Use stable parameters for cacheable function

It doesn't do much good to mark a function as cacheable if we call it
every single time with different arguments due to using the current date
and time. Fix it by passing the offset in instead.

Signed-off-by: Dan McGee <dan@archlinux.org>
Admin template updates for Django 1.6

Signed-off-by: Dan McGee <dan@archlinux.org>
Add delay function to MirrorLog model

Signed-off-by: Dan McGee <dan@archlinux.org>
Add mirror URL details page

This will allow those that care about mirrors to zoom into URL-level
details for each mirror and examine the individual check results.

Signed-off-by: Dan McGee <dan@archlinux.org>
Use select_related() in new mirror URL details view

Signed-off-by: Dan McGee <dan@archlinux.org>