Merge pull request #23 from jirislaby/master

add some more packages
gnome-3.8: new packages added for 3.8.2
package_list: enable powertop

Fix location of trinity and sparse, but don't add them just yet, they
are in testing for now...
package_list: enable sparse and trinity
package_list: add security/rkhunter
package_list: add screen and tmux
package_list: add e2fs and btrfs and mecurial tools
package_list: add new qemu and kvm