Remove some Ubuntu manifest notes that aren't validate anymore
Bulk update the past 6 months package changes.

Additions:
aptitude, discover, screen, evince-gtk, libavcodec-extra, language-pack-kde-en
Removals:
sockstat, jockey-common, byobu, bzr*, meld, quickly, banshee-extension-ampache,
conky-all, ubuntu-desktop, unity-tweak-tool, boinc
Remove netflix-desktop PPA used on earlier Ubuntu's in favor of Pipelight
Remove lightdm cruft from moving to Kubuntu only
Remove autofs distro specific cruft introduced during raring -> saucy transition
Remove PAM distro specific cruft introduced during raring -> saucy transition (systemd lines)
Reorganize and cleanup packages slightly
Update OS release specific Handbrake package selection
Add NVIDIA driver class
Bump Cinnamon to ensure => latest from nightly until final version is out for 14.04
Update Ubuntu SDC header to infer 14.04+ compat only