Evil CSS hackery to prevent link targets from being under the navbar

http://stackoverflow.com/questions/9047703/fixed-position-navbar-obscures-anchors
Compatibility with latest bootstrap
Ensure that the first tab is selected
Remove unused file
Give every page a consistent title
Fix indentation

Also move flashing into layout.tt.
Group some menu items together under a "Status" menu
Allow non-admin users to see the machine status page
Formatting tweaks
Fix indentation of build.tt
Remove unnecessary Javascript code

Tabs are activated automatically.
Always show the build duration (using the cached build if necessary)
Show the runtime/build dependencies in the build page
Load the dependency tabs on demand
Dependency tree: Revert to "repeated" links
There is only one channel, so drop the "(latest)" suffix
Remove debug statement
All/recent builds -> Latest builds
Don't generate clashing IDs