Symlinks

Resolves #10 and #6 
Partially resolves #15 (xfce4-notifyd, xfwm4, xfpm-ac-adapter, xfce4-session, preferences-desktop [Settings Manager])

xfce4-panel, wmtweaks, xfce4-workspaces still need tweaks.

#11 could probably use Cheese's icon ("cheese"), as the QV4L2 icon ("qv4l2") is just a very generic box thingy.