1.0.0

• Adds options.container to ouput datepicker to a specific markup location
• Adds options.toggle (different than previously named options.toggle) to use an existing element as the datepicker toggle
• Moves options.toggle.button to options.toggleIcon
• Moves options.toggle.label to options.toggleAriaLabel
• Fix invalid date bug (#43)
• Change onSuccess param order (#44) so value is first