Replacement for jquery.ui.accordion to avoid dealing with jquery.ui theming.

Usage: $('#container').squeezebox(options);

where the direct child elements of '#container' are sequential pairs of header/panel elements, and options is an optional object with any of the following properties:

activeHeaderClass:  Class name to apply to the active header
headerSelector:     Selector for the header elements
nextPanelSelector:  Selector for the next panel from a header
speed:              Animation speed