Merge pull request #196 from xdave/master

Various
New package: udevil-0.4.1.
gnome-control-center: disable libsocialweb support, development has ceased.
libsocialweb: removed; development has ceased and it's not used currently.
lxdm: various fixes for systemd/pam (via Arch).
slim: various misc fixes.
New package: xfce4-dev-tools-4.10.0.
xfce4-dev-tools: needs libtool too.
xfce4-session: use logind to suspend/resume.
udisks: various fixes from Arch.
lxde-icon-theme: update to 0.5.0.
lxappearance: update to 0.5.3.
f2fs-tools: update to 1.2.0.
shadow: remove nologin(8); provided by util-linux>=2.24.
shadow: needs libtool in cross builds.
util-linux: conflicts with shadow<4.1.5.1_14.