toggleExpanded() and toggleActive() changed to onToggleExpanded() and onToggleActive(). Also, expandedArgumentsQueue introduced to hold arguments for animation duration and allowMultiple

Conflicts:
	src/wp-admin/js/customize-controls.js
Normalize API for passing parameters to	activate/deactivate, expand/collapse

Add defaultActiveArguments and defaultExpandedArguments
Clean up some JS formatting (tabs vs spaces, trailing whitespace, etc)
Pass onToggleActive args.duration to slideDown/slideUp
Add activeArgumentsQueue to Control
Use onToggleExpanded onToggleActive naming on Widget controls
Close top-level sections immediately when opening panel
Fix _applyCardinalOrderClassNames to use API instead of DOM traversal
Merge pull request #37 from xwpco/trac-28709-kienstra

Build on changes from @kienstra