4.3.0

• Added support for inverted (right-to-left and bottom-to-top) sliders.
• Added a new block callback.
• Added new options and features to serialization:
  • Added option to serialize to a function.
  • Added option to serialize to any jQuery/Zepto element using any method.
  • Serialization fields are now filled upon initialization.
  • All settings within serialization are now optional.
  • The to option now optionally accepts an array of items to serialize to.
  • to now properly handles sets of multiple elements.
• Fixed implementation of the margin option.
• Fixed potentially unbinding events set by other plugins.
• Fixed certain browsers showing the text selection cursor on drag.
• Fixed an issue where an unintended mouseup on a slider might cause a 'tap'.
• Fixed compatibility with $.noConflict().
• Simplified handle stacking order. Check your CSS when upgrading!
  A minor change is required. See the chapter on styling for more information.
• Re-licensed to WTFPL. This changes nothing but the license name. The text and terms are identical.
• Settings for margin and step are now applied to .val() input and the start option.
• Reduced redundant event firing to make performance on older devices snappier. Events will no longer keep firing endlessly when a handle has hit a limit.