Fairly large changes. In order of importance:
(1) I fixed some buggy behavior with the sliders. Now it's cleaner
    and works better. These changes are not to be reverted.
(2) Swapped qTip2 in for jquery-ui tooltip, since it's more reliable
    and generally easier to work with. However, there are still a few
    issues to work out (with the slider weights + tooltips). These
    changes *can* be reverted, but that should really be avoided if
    possible.
(3) I'm experimenting with some UI changes to make better use of
    screen space. These can be reverted, but they're also not done yet.
qtip tooltips work well, but I've removed them from the slider text areas because of the changes I just committed
made small tweaks to ui