vimPlugins.YouCompleteMe: updated to latest
sparse: 0.4.4 -> 0.5.0

Signed-off-by: Austin Seipp <aseipp@pobox.com>
openra: 20131223 -> 20140608
apache 2_4 update, fixes some CVE's

See http://www.apache.org/dist/httpd/Announcement2.4.html It compiles,
didn't run it. I guess minor update doesn't cause much trouble even
though there are some new features
linux: Update to 3.12.25
nixos/munin: change activationScript to preStart script

All activation scripts run in serial upon boot and nixos-rebuild switch
etc., in contrast to preStart which run before a service starts, and can
run in parallel with other services.

The munin(-node) activation script is particularly slow. Change it to a
preStart script so that it can run in parallel with other services and
not slow down boot (or nixos-rebuild switch).

This reduces (repeated) "nixos-rebuild test" time from ~16 seconds to ~8
on my (old) laptop.